Are CPP and OAS Taxable?

Yes. Both the Canada Pension Plan (CPP, the monthly cheque you get from your past work contributions) and Old Age Security (OAS, the monthly cheque you get based on your age and years living in Canada) are taxable income. You pay federal and provincial income tax on them, just like you did on your paycheques. Two big pieces of retirement money are not taxed, though: the Guaranteed Income Supplement (GIS, extra money for low income seniors) and money you pull out of a TFSA (a savings account where growth comes out tax free).

This matters when you are adding up what you can live on. If your CPP and OAS look like exactly enough, taxes can shrink that number.

How the tax works

Every January or February, Service Canada mails you (or posts online) a slip called a T4A. It shows how much CPP and OAS you got last year. You copy those numbers onto your tax return.

That money joins your other income, like RRIF withdrawals (money from an RRSP turned into yearly payments) or interest from a savings account. Then you pay:

• Federal tax, at rates set by Ottawa, and
• Provincial tax, at rates set by your province.

Those rates and the low income amounts where tax starts are set each year, so they change. The Government of Canada's pension benefits page covers the cheques, and the Canada Revenue Agency covers the rates and slips.

Here is the full picture of what gets taxed and what does not.

Money coming in	Taxed?
CPP payments	Yes
OAS payments	Yes
GIS payments	No
RRSP and RRIF withdrawals	Yes
TFSA withdrawals	No
Non registered savings interest	Yes

The non registered line just means an ordinary savings or investment account, not an RRSP or TFSA. Interest there is taxed like regular income.

A worked example, with made up numbers

Say you get $12,000 a year in CPP and $8,400 a year in OAS. That adds to $20,400. You also pull $9,600 out of your RRIF. All $30,000 of it is taxable income.

To keep the math easy, let us pretend the first $16,000 of income each year is tax free, and everything above that is taxed at 20 percent. Real amounts change every year and by province, so treat these as a guessing game, not the truth.

Step by step:

1. Total income: $12,000 + $8,400 + $9,600 = $30,000.
2. Subtract the pretend tax free amount: $30,000 − $16,000 = $14,000.
3. Tax at 20 percent: $14,000 × 0.20 = $2,800 for the year.

So out of roughly $2,500 a month coming in, close to $233 a month would go to tax in this pretend world. If all your income were CPP and OAS with no RRIF, the bill would be smaller. If you had a workplace pension too, it would be bigger.

A lower tax rate starting point usually applies in real life than my made up 20 percent, and provinces differ, so your true bill is often less than an estimate like this. The guide to how taxes work in retirement walks through federal and provincial tax, credits that lower your bill, and the receipts that matter, without jargon.

Does tax come off my cheque automatically?

Not always. When you apply for CPP or OAS, you can sign up to have some tax held back from each payment before it reaches you. If you skipped that step, no one holds anything back. You still owe the tax, but you pay it when you file your return in the spring.

Two things help here:

• You can contact Service Canada later and ask to have tax withheld going forward, using their form.
• Some people simply leave the money aside during the year, or pay into installments (small tax payments spread through the year) if the bill is large.

Owing a little in April is normal and harmless if you planned for it. Owing a surprise is the stressful version, so it pays to know the size ahead of time.

How these cheques affect other benefits

Tax is not the only way your income level matters. Two other rules depend on how much you bring in:

• GIS shrinks as other income grows. If you receive the Guaranteed Income Supplement, most other income cuts it back. Money from CPP counts, and so do RRIF withdrawals. The OAS cheque itself does not count against your GIS.
• OAS can be clawed back at higher incomes. Once your yearly income passes a threshold (a cutoff set each year and shown on the Government of Canada site), you repay part of your OAS through the tax return. This only kicks in at fairly high retirement incomes, so most people never see it.

If you are still choosing when to start each cheque, timing changes the size of the amounts and how they stack with your other income. Our piece on how to delay CPP and OAS goes through the tradeoffs plainly.

Estimating your own tax bill

You do not need perfect numbers to plan. Rough steps:

1. List every money stream: CPP, OAS, RRIF or RRSP plans, workplace pensions, part time work.
2. Assume all of it is taxable except GIS and TFSA withdrawals.
3. Guess the tax. Keeping a cushion, like 10 to 20 percent of taxable income for tax, is common for modest incomes, and less is likely if most of your income is CPP and OAS alone.

For example, someone with $26,000 of CPP and OAS might put away $3,900 a year for tax (15 percent) and probably not miss it if the real bill is smaller. Someone drawing $45,000 from a mix of sources might set aside closer to 20 percent.

One caution: a TFSA can quietly become your best friend in retirement because withdrawals never raise your taxable income. That means they never touch your GIS or push you toward the OAS clawback. If most of your savings sit in an RRSP instead, you may want to think about the order in which you draw accounts down, since RRSP withdrawals are taxed.

Thinking through all of this by hand gets messy fast, especially with benefits that start years apart. When Can I Retire works out the age you can retire and how ready you are today, counts your CPP and OAS along with pensions, taxes, inflation and the years before benefits begin, and shows every step of the math, with a free check at /signup.

A note for readers with cross border history

If you paid into both the Canadian and American systems over your career, you may end up with CPP or OAS plus U.S. Social Security. The U.S. side has its own tax treatment that surprises people. We cover whether U.S. Social Security gets taxed in our companion article, so the two sides of your retirement do not blend together in your head.