How Many Credits Do You Need to Graduate High School in Ontario?

Quick Answer: To earn an Ontario Secondary School Diploma (OSSD), students need 30 high school credits. Students who started Grade 9 in 2023 or earlier generally need 18 compulsory and 12 optional credits, while students who started Grade 9 in 2024 or later need 17 compulsory and 13 optional credits. Other graduation requirements also apply.

Understanding how many credits you need to graduate high school in Ontario sounds simple until you start looking at compulsory courses, optional courses, online learning, literacy, community involvement and changing graduation rules.

The most important number is 30 credits, but reaching 30 does not automatically mean a student is ready to graduate.

Students must complete the correct combination of compulsory and optional Ontario high school credits and satisfy the additional Ontario Secondary School Diploma requirements that apply to their graduation cohort.

The rules also changed for students who entered Grade 9 in 2024 and again for certain students beginning Grade 9 in the 2025–2026 school year. That makes the year a student entered Grade 9 particularly important when planning an OSSD.

Online learning can also help students missing a credit, upgrading a mark, completing a prerequisite, or seeking greater scheduling flexibility. Canadian Virtual School offers Ontario high school courses for Grades 9–12 through a flexible online learning model.

This guide explains how Ontario high school credits work, which credits are compulsory, what else you need to graduate and how to determine the courses you still need.

How Many Credits to Graduate High School in Ontario, and Which Are Compulsory?

You need a minimum of 30 credits to earn the Ontario Secondary School Diploma. If you started Grade 9 in September 2023 or earlier, this normally means 18 compulsory credits and 12 optional credits. If you started Grade 9 in the 2024–2025 school year or later, it normally means 17 compulsory credits and 13 optional credits.

However, the way those 30 credits are divided depends on when you started Grade 9.

The 2024 changes did not reduce the total number of credits required to graduate. Instead, Ontario changed the combination of compulsory and optional credits.

Students who entered Grade 9 in 2024 or later have a compulsory technological education requirement and a STEM-related compulsory credit. The older Group 1, Group 2 and Group 3 structure applies to students who began Grade 9 in 2023 or earlier.

Credits are only one part of graduation.

Depending on the student’s cohort and circumstances, an OSSD may also require:

• completion of the provincial secondary school literacy requirement;
• 40 hours of community involvement activities;
• completion of the applicable online learning requirement; and
• completion of the financial literacy graduation requirement where it applies.

In simple terms: Do not determine graduation eligibility simply by counting the number of credits on a transcript. Check the type of credits and all applicable non-credit requirements as well.

Students should review their Ontario Student Transcript and graduation plan with their school or academic advisor before selecting additional courses.

What Credits Are Required for an OSSD?

Ontario divides diploma credits into compulsory credits and optional credits.

Compulsory credits are credits students must earn in designated subject areas. Optional credits give students greater choice and can be used to explore interests, build prerequisites or prepare for university, college, apprenticeship or workplace pathways.

The compulsory-credit structure depends on the student’s Grade 9 entry year.

Students Who Started Grade 9 in 2023 or Earlier

These students generally require 18 compulsory credits and 12 optional credits.

What Are Group 1, Group 2 and Group 3 Credits?

For students under the earlier OSSD framework, three additional compulsory credits must come from designated subject groups.

Group 1 can include eligible courses from areas such as English, French as a second language, First Nations, Métis and Inuit studies, social sciences and humanities, Canadian and world studies, guidance and career education, languages and cooperative education.

Group 2 can include eligible courses in health and physical education, arts, business studies, French as a second language and cooperative education.

Group 3 can include eligible senior science, technological education, French as a second language, computer studies and cooperative education courses.

Restrictions limit how some courses can be used across these groups, so students should not assume that any course within a broad subject area will automatically satisfy a particular compulsory requirement.

Students Who Started Grade 9 in 2024 or Later

Students entering Grade 9 in the 2024–2025 school year or later generally need 17 compulsory credits and 13 optional credits.

The STEM-related compulsory credit can come from eligible areas such as business studies, computer studies, cooperative education, additional mathematics, additional science or additional technological education.

The key difference is that students entering Grade 9 in 2024 or later follow the newer technological education and STEM-related framework rather than the older Group 1, Group 2, and Group 3 structure.

What Else Do You Need to Graduate Besides Credits?

Thirty credits are central to the OSSD, but students must also complete other graduation requirements.

Community Involvement Hours

Ontario students generally need to complete 40 hours of community involvement activities.

Students can begin accumulating eligible hours during the summer before entering Grade 9.

Community involvement is intended to help students participate in their communities, develop transferable skills and gain experience outside the classroom.

Students should confirm that an activity is eligible before relying on it for graduation hours. Schools must review and record completion of the requirement, and special rules can apply to transfer students and some adult learners.

A good strategy is to start early rather than wait until Grade 12 to complete all 40 hours.

Ontario Secondary School Literacy Requirement

Students must meet Ontario’s provincial secondary school literacy requirement before receiving an OSSD.

Many students meet the requirement by completing the Ontario Secondary School Literacy Test, commonly known as the OSSLT.

Depending on the student’s circumstances and eligibility, other Ministry-authorized pathways may be available, including the Ontario Secondary School Literacy Course (OSSLC).

Students unsure of their literacy status should check their school records rather than assuming that completing an English course automatically satisfies the literacy requirement.

Online Learning Requirement

For students who entered Grade 9 in the 2020–2021 school year or later, Ontario generally requires at least two online learning credits as part of the OSSD.

The requirement also applies to certain adult learners who entered the Ontario secondary school system in the 2023–2024 school year or later.

However, Ontario provides an opt-out or exemption process in applicable circumstances.

This means the two-online-credit rule should not be applied the same way to every student. A student’s Grade 9 entry year, age, previous schooling and opt-out status can affect what is required.

Financial Literacy Graduation Requirement

Ontario introduced an additional financial literacy graduation requirement beginning in the 2026–2027 school year for students who entered Grade 9 in the 2025–2026 school year or later.

Eligible students complete the requirement through their compulsory Grade 10 Career Studies course.

Students must achieve at least 70% on the financial literacy requirement. The financial literacy component contributes to the student’s Career Studies course mark, and successful completion is recorded in the student’s graduation record.

This is an important cohort distinction.

A student who started Grade 9 in 2024–2025 follows the newer 17 compulsory and 13 optional credit structure, but the separate financial literacy graduation requirement applies beginning with the Grade 9 cohort that started in 2025–2026, subject to applicable Ministry exceptions.

How Many Credits Should You Have in Grade 9, 10, 11 and 12?

Ontario does not set a universal rule requiring every student to have an exact number of accumulated credits at the end of each grade.

Students may take different course loads because of transfers, specialized programs, timetable changes, failed or repeated courses, summer school, online learning and individual circumstances.

A more useful approach is to plan by academic stage.

Grade 9

Grade 9 establishes the foundation for later course selection. Students should pay close attention to compulsory English, mathematics, science, geography, French and other applicable requirements.

Students under the newer graduation framework should also plan for the technological education requirement.

Grade 10

Grade 10 is an important checkpoint. Canadian history, civics, Career Studies and other compulsory requirements often appear at this stage.

Students should also begin thinking seriously about the Grade 11 courses required for their intended Grade 12 pathway.

Grade 11

Grade 11 course selection can directly affect post-secondary options.

A student who wants Grade 12 Chemistry, Physics, Biology, Advanced Functions or another senior course may first need the relevant prerequisite.

Waiting until Grade 12 to discover a missing prerequisite can create unnecessary scheduling problems.

Grade 12

Grade 12 is not simply about collecting enough remaining credits.

Students should confirm:

• remaining OSSD requirements;
• compulsory credits;
• literacy status;
• community involvement hours;
• applicable online learning requirements;
• financial literacy status where applicable; and
• university, college or other post-secondary prerequisites.

Important: This grade-by-grade framework is a planning guide, not an official minimum-credit requirement for each grade.

Can You Earn Ontario High School Credits Online?

Short answer: Yes. You can earn Ontario high school credits online when you take courses through a school authorized to grant credits toward the Ontario Secondary School Diploma.

Online courses can be used for many different academic purposes, including:

• completing a missing compulsory credit;
• earning an optional credit;
• resolving a timetable conflict;
• completing a prerequisite;
• repeating a course;
• improving a mark;
• working toward OSSD completion; or
• preparing for university or college admission.

Online learning does not remove Ontario curriculum expectations.

Students still have to complete the required learning activities, assessments and evaluations and demonstrate achievement of the course expectations before a credit can be granted.

Canadian Virtual School is an Ontario Ministry-inspected private school offering Grades 9–12 OSSD credit courses online. Students can enrol year-round and complete individual courses without necessarily moving their entire academic program to an online school.

For some students, that means taking one additional course alongside their regular school. For others, online courses can form part of a broader OSSD completion plan.

If you already know which credit you are missing, reviewing the available Canadian Virtual School OSSD courses can help you determine whether an appropriate online option is available.

How Fast Can You Earn an Accredited High School Credit Online?

Short answer: There is no single guaranteed completion time for an Ontario high school credit online.

The time required depends on several factors, including:

• the course;
• the student’s prior knowledge;
• the amount of time available each week;
• assessment requirements;
• prerequisite knowledge;
• the student’s pace of learning; and
• school policies governing course completion.

Asynchronous online learning can offer greater scheduling flexibility because students are not always tied to a traditional daily classroom timetable.

That flexibility should not be confused with skipping required coursework.

A student who can dedicate more focused time to one course may progress differently from a student balancing six other courses, athletics, employment or family responsibilities.

The key difference is: accelerated learning means organizing required learning efficiently. It does not mean bypassing curriculum expectations or required assessments.

Students planning around a university application, graduation deadline or prerequisite should leave enough time for coursework, assessment, final evaluation, grading and academic-record processing rather than relying on a minimum advertised timeframe.

Online Academic Upgrading or Diploma Completion: Which Do You Need?

Academic upgrading and diploma completion solve different problems.

Academic Upgrading

Academic upgrading is generally appropriate when a student wants to improve a specific course result or complete a prerequisite.

For example, a graduate may need to strengthen a Grade 12 mathematics, English or science mark before applying to a particular post-secondary program.

The student focuses on the course, not rebuilding the entire diploma.

Diploma Completion

Diploma completion applies when a student has not yet satisfied all requirements for an OSSD.

The student may be missing:

• compulsory credits;
• optional credits;
• the literacy requirement;
• community involvement hours;
• an applicable online learning requirement; or
• another graduation requirement that applies to the student’s cohort.

In simple terms: If you already graduated but need a stronger course or an additional prerequisite, consider upgrading. If you have not graduated, start with a complete OSSD requirement review.

How to Finish High School Online as an Adult in Ontario

Adults return to secondary education for many reasons. Some want an OSSD for employment. Others are preparing for college, university, apprenticeship training or a career change.

The first step is not automatically registering for several courses.

It is determining what the adult learner has already completed.

Previous Ontario credits, schooling completed elsewhere and other eligible prior learning may affect the number of credits or graduation requirements that remain.

A practical adult diploma-completion process is:

1. Gather previous transcripts and academic records.
2. Have the school review the records.
3. Determine whether mature-student or prior-learning provisions apply.
4. Identify outstanding OSSD requirements.
5. Review post-secondary prerequisites if further education is the goal.
6. Build a realistic course plan.
7. Complete remaining requirements through an appropriate delivery method.

Online learning can be especially useful for adults managing employment, family responsibilities or other commitments because coursework can fit more easily around an existing schedule.

However, adult OSSD requirements can vary based on previous education and individual circumstances. A qualified school administrator should review the learner’s record before creating a final graduation plan.

Online Credit Recovery in Ontario: How to Replace a Missing or Failed Credit

Failing one high school course does not necessarily mean a student must restart an entire grade.

The correct next step depends on the course that was failed, the student’s achievement, the requirement the course was intended to satisfy and the school’s available options.

Credit recovery can refer to an approved process through which an eligible student addresses unmet course expectations after an unsuccessful attempt.

In other situations, repeating the full course may be more appropriate.

Students should first determine:

• whether the failed course is compulsory or optional;
• whether it is a prerequisite for another course;
• whether the credit is still needed for graduation;
• whether the student needs the same course for post-secondary admission; and
• which approved recovery or repeat option applies.

An online course can provide scheduling flexibility when a student needs to repeat or replace a course, but one course cannot automatically be substituted for any other failed credit.

Transcript review is essential.

If the missing course is also a prerequisite for a Grade 12 course, resolving it earlier can prevent a second problem later in the student’s academic plan.

Homeschool to OSSD: How to Plan Accredited High School Credits

Homeschool families may enter the Ontario secondary-school credit system for many reasons, including diploma completion, formal academic records, or preparation for post-secondary education.

Begin the transition with an academic review.

Previous homeschooling does not automatically translate course-for-course into Ontario secondary school credits.

When a student transfers from homeschooling into a school that grants OSSD credits, the principal reviews the student’s previous learning and determines appropriate placement, equivalency, and remaining requirements under applicable Ontario policies.

Families should focus on five areas:

1. Previous learning: Gather records of completed subjects and academic work.
2. OSSD requirements: Determine what compulsory and optional requirements remain.
3. Grade placement: Identify the appropriate Ontario courses for the student’s current academic level.
4. Prerequisites: Work backward from senior courses the student may need.
5. Post-secondary planning: Match Grade 11 and Grade 12 choices to future university, college, apprenticeship or career goals.

Keeping organized records becomes particularly important during the transition.

Online OSSD courses can also allow homeschool students to begin earning formal Ontario credits while maintaining flexibility in where and when they study.

Do You Need Specific High School Credits for University or College?

Yes. Having enough credits to graduate does not necessarily mean a student has the courses required for a specific university or college program.

This distinction is one of the most important parts of high school planning.

Graduating from high school and qualifying for a specific post-secondary program are related but different goals.

The OSSD establishes Ontario’s secondary-school graduation requirements.

Universities and colleges establish their own admission requirements for individual programs.

A post-secondary program may consider:

• specific Grade 11 or Grade 12 prerequisites;
• Grade 12 university or university/college preparation courses;
• mathematics requirements;
• English requirements;
• science prerequisites;
• minimum course grades;
• competitive admission averages; and
• supplementary application requirements.

For example, completing 30 OSSD credits does not help if a student later discovers that the program they want requires a Grade 12 course for which they never completed the Grade 11 prerequisite.

Students planning to apply through OUAC or to Ontario colleges should review the current admission requirements for each specific program.

Requirements can change and can differ significantly between institutions and programs.

Best practice: Start with the desired post-secondary program and work backward through the Grade 12 and Grade 11 prerequisites.

Which Online High School Credits Should You Take?

The right online credit depends on the academic problem you are trying to solve.

Use this priority order.

1. Graduation Requirements

First determine whether you are missing a requirement needed for the OSSD.

A compulsory graduation credit normally takes priority over an extra optional course.

2. Missing Compulsory Credits

Identify whether the missing credit must come from English, mathematics, science, Canadian history, geography, technological education or another compulsory category applicable to your cohort.

3. Post-Secondary Prerequisites

Check the prerequisites for the university or college programs you are considering.

A course that is optional for the OSSD may still be essential for admission.

4. Academic Upgrading

If you’ve already completed the required course but your mark isn’t competitive for your intended program, consider an upgrade.

5. Timetable Conflicts

Online learning can provide another scheduling option when two required courses are offered at the same time in a student’s regular timetable.

6. Personal Circumstances

Athletics, travel, employment, health-related scheduling needs and other commitments may make a flexible course format useful.

7. Graduation Timeline

Work backward from the date by which the course needs to be completed and leave sufficient time for assessment, evaluation and academic-record processing.

How to Find Out Which High School Credits You Are Missing

Do not guess.

Use your academic record and work through the requirements systematically.

Step 1: Review Your Ontario Student Transcript

Start with the official record of the secondary school credits you have completed.

Check course codes, final marks and credits earned.

Step 2: Separate Compulsory Credits From Optional Credits

Thirty total credits are not enough if you are still missing a compulsory category.

Compare completed courses with the compulsory-credit framework that applies to your Grade 9 entry year.

Step 3: Identify Outstanding Graduation Requirements

Mark every compulsory category as:

• completed;
• currently in progress; or
• still required.

Then calculate how many optional credits remain.

Step 4: Check Literacy and Other Non-Credit Requirements

Confirm the status of:

• the provincial literacy requirement;
• community involvement hours;
• applicable online learning credits; and
• the financial literacy graduation requirement where applicable.

Step 5: Review Post-Secondary Prerequisites

Now look beyond graduation.

Compare your completed and planned courses with the admission requirements for programs you may apply to.

Step 6: Create a Realistic Course Plan

Prioritize courses according to dependencies.

If Course B requires Course A, take Course A first.

Step 7: Choose an Appropriate Online Learning Pathway Where Needed

Once you’ve clearly identified the gap, determine whether an online course can solve it.

A single carefully selected course can sometimes resolve a missing prerequisite, timetable conflict or graduation-credit gap without changing the student’s entire school program.

If your transcript review identifies a missing credit, Canadian Virtual School can help you explore available Grades 9–12 online course options and determine which course fits your academic plan.

Common Mistakes Students Make When Planning OSSD Credits

Counting Only the Total Number of Credits

A student can be close to 30 credits and still be missing a compulsory requirement.

Always check categories, not just totals.

Counting Optional Credits Incorrectly

An elective does not automatically replace a compulsory course.

The course must satisfy the correct requirement.

Ignoring Prerequisites

Taking Grade 12 courses without planning Grade 11 prerequisites can limit future options.

Waiting Until Grade 12

Start graduation planning well before the final year.

A missing prerequisite discovered late can affect both graduation and post-secondary applications.

Assuming All Online Courses Are Identical

Students should confirm that the school is authorized to grant OSSD credits and that the course fits their graduation or admission plan.

Forgetting Non-Credit Requirements

Literacy, community involvement and other applicable graduation requirements can still prevent diploma completion even after 30 credits are earned.

Not Reviewing the Transcript

Memory is not a reliable graduation-planning system.

Use the student’s academic record.

Choosing Courses Without Considering Future Goals

The easiest elective isn’t always the most useful choice.

Senior course selection should support both graduation and the student’s intended post-secondary pathway.

Who Can Benefit From Online High School Credits in Ontario?

Online courses can help many learners, but they aren’t automatically the right choice for everyone.

Students who may benefit include:

Students With Timetable Conflicts

An online course may provide access to a needed subject that doesn’t fit the regular timetable.

Student-Athletes

Training, competition and travel can make traditional scheduling difficult.

Students Seeking Greater Flexibility

Some learners work more effectively when they can organize coursework around other responsibilities.

Students Missing a Prerequisite

An individual online course can help establish eligibility for a later senior course.

Students Upgrading Marks

Students may repeat an academic course to strengthen their record for a future application.

Students Recovering Credits

An appropriate online course may help students address a failed or missing credit when permitted by their academic plan.

Adult Learners

Flexible scheduling can make high school completion more manageable alongside employment and family commitments.

Homeschool Students

Online Ontario courses can provide a structured route into formal OSSD credit study.

Students Who Need Additional Course Options

Students may seek courses that are unavailable or difficult to schedule at their current school.

Students Managing Travel or Other Commitments

Online access can provide continuity when a conventional daily timetable is impractical.

The best learning format ultimately depends on the student’s independence, academic needs, schedule and preferred learning environment.

Complete Your Ontario High School Credits Online With Canadian Virtual School

Canadian Virtual School provides online Ontario high school courses for students in Grades 9–12.

As an Ontario Ministry-inspected private school, CVS offers eligible courses that can lead to Ontario Secondary School Diploma credits when students complete all course requirements.

Students can use Canadian Virtual School for different academic goals, including:

• earning an individual OSSD credit;
• completing a missing graduation course;
• meeting a prerequisite;
• repeating a course;
• upgrading a mark;
• completing Grade 12 courses;
• supplementing courses taken at another school; or
• working toward broader OSSD completion.

The online model offers flexible scheduling and year-round enrolment, allowing students to begin courses at different points in the year rather than waiting for a traditional semester start.

Students complete Ontario curriculum-aligned coursework and required assessments while receiving teacher support throughout the course.

This can be particularly useful when a student does not need to change schools but needs one specific credit.

Students working toward a full OSSD should have their complete academic record reviewed so that course selection reflects their compulsory credits, optional credits, literacy requirement, community involvement, applicable online-learning requirement and future academic goals.

Which Ontario Online High School Pathway Is Right for You?

The correct pathway depends on the student’s transcript, Grade 9 entry year, previous education, prerequisites and academic goals.

When in doubt, identify the requirement first, then select the course.

Frequently Asked Questions About Ontario High School Credits

Ready to Complete Your Ontario High School Credits?

Being one or two credits short does not necessarily mean restarting your entire high school pathway.

Start by reviewing your Ontario Student Transcript and answering four questions:

1. How many credits have you already completed?
2. Which compulsory OSSD requirements are still missing?
3. Have you completed the applicable non-credit graduation requirements?
4. Do you need any additional courses for university, college or another post-secondary pathway?

Once you know the gap, you can choose a course based on what you actually need rather than simply adding another credit.

Canadian Virtual School offers flexible online OSSD courses for Grades 9–12, including individual courses for students completing graduation requirements, prerequisites, academic upgrading or additional Ontario high school credits.

Review the available courses, identify the credit you need and build an online high school pathway that supports both graduation and what comes next.