TFSA Contribution Room Calculator

How TFSA room actually accrues

Contribution room isn't something you apply for or that a bank calculates for you when you open an account — it accrues automatically, every year, to every Canadian resident who is 18 or older, whether or not they ever open a TFSA. The account itself didn't exist before 2009, so nobody's room starts earlier than that; for anyone who turned 18 after 2009, room starts counting in the year they turned 18, not before. That's the entire eligibility rule this calculator applies: your first eligible year is whichever is later, 2009 or the year you turned 18.

Each year's limit gets added to a single running total, and that total simply accumulates — it isn't reset annually the way an RRSP deduction limit interacts with taxable income, and it doesn't expire if you skip a year. Someone who turned 18 in 2015 and never opened a TFSA until this year still has every year's limit from 2015 onward sitting in their available room, untouched and unexpired, exactly as if they'd been tracking it the whole time. The table above is that arithmetic laid bare, year by year, for someone eligible since the very beginning — the calculator above it does the same math starting from your own birth year instead.

One nuance worth flagging: the CRA's actual rule is based on the calendar year you turn 18, not on "birth year plus 18" as a fixed offset — this calculator uses the birth-year-plus-18 approximation, which lands on the correct year for the overwhelming majority of birthdates and only risks being off for people born very early or very late in a year relative to when CRA's own eligibility clock starts. If your birthday is near a year boundary, check your actual room against your CRA My Account, which tracks it precisely.

Withdrawals give room back — but not until next January

This is the rule that trips up more TFSA holders than any other. Withdraw money from a TFSA and you get that exact dollar amount back as contribution room — eventually. It is not added back immediately, and it is not added back at any point during the same calendar year you withdrew it. It's added back on January 1 of the following year, full stop, no exceptions for how long the money sat in the account or why you took it out.

Picture someone who has exactly $0 of room left, withdraws $10,000 from their TFSA in March to cover an emergency, and then in October — flush with cash again — deposits $10,000 back into the same account, reasoning that they're just "putting back what they took out." That October deposit is a full $10,000 over-contribution. The $10,000 of room the March withdrawal created doesn't exist yet; it doesn't show up until the following January 1. The CRA doesn't track "money you personally withdrew and are now redepositing" as a special case — it only tracks whether a given deposit fits inside your currently available room, and in October that room was still $0.

The "Total withdrawn before this year" field in the calculator above reflects this exactly: it only asks for withdrawals made in years before 2026, because those are the only ones that have actually landed in your available room as of today. A withdrawal made during 2026 itself doesn't belong in that field — it won't affect your room until January 1, 2027.

The penalty: CRA's 1%-per-month excess tax

Contribute more than your available room and the CRA applies a tax of 1% per month on the highest excess amount your account held during that month — 1% a month works out to roughly 12% a year, and it keeps accruing every month the excess stays in the account, whether that's one day past the end of the month or the whole month. This isn't a one-time fine; it's a recurring monthly charge under section 207.02 of the Income Tax Act that only stops once the excess is withdrawn or enough new room opens up (typically the following January 1) to absorb it.
Source: CRA — "If you over-contribute to a TFSA".

You self-report and self-pay this tax — the CRA doesn't send a bill automatically the way it does with some other assessments. It's reported on Form RC243 (TFSA Return), due by June 30 of the year following the excess. The fix, once you spot an over-contribution, is simple and time-sensitive: withdraw the excess amount immediately. Every additional month you leave it in the account is another 1% charged against the highest excess balance that month held, so the cost of waiting compounds in the worst direction — waiting doesn't buy you anything, it just adds another month's charge.

The warning banner above turns on the moment your inputs describe an over-contribution — it shows the excess amount and an estimate of what one month's 1% penalty on that excess would cost, so the urgency of fixing it is a concrete number, not an abstraction.

Common mistakes

• Re-contributing a withdrawal in the same calendar year. Covered in detail above — this single mistake accounts for a large share of all TFSA over-contribution penalties the CRA assesses every year, precisely because it feels intuitively like "putting the money back," when the room mechanically hasn't been restored yet.
• Assuming a transfer between TFSA institutions counts as a fresh contribution. Moving your TFSA from one bank or brokerage to another, done correctly as a direct institution-to-institution transfer, does not use any contribution room — it's the same dollars, the same account relationship, just held somewhere new. Withdrawing the cash yourself and re-depositing it at the new institution, instead of requesting a proper transfer, does count as a withdrawal-then-contribution and can trigger the same same-year mistake above.
• Not accounting for years spent as a non-resident. TFSA room only accrues for years you were a Canadian resident. Someone who spent several years living and working abroad as a non-resident didn't accumulate room during those years, even though the calendar years themselves passed — a detail this calculator's simple birth-year model doesn't account for and that residents with a non-resident stretch need to adjust for manually.
• Holding US dividend-paying stocks inside a TFSA. The CRA doesn't tax TFSA income, but the IRS does — because the US doesn't recognize a TFSA as a tax-deferred retirement account the way it recognizes an RRSP under the Canada-US tax treaty. Dividends paid by US corporations into a TFSA are subject to a flat 15% US withholding tax, deducted before the cash ever reaches the account, with no way to claim it back (unlike in a regular taxable account, where a foreign tax credit can often offset it). That same withholding does not apply inside an RRSP, which the treaty does recognize. If US dividend income is a meaningful part of your strategy, this is a real cost worth weighing — see the Dividend Income & DRIP Calculator's tax FAQ for more on the underlying treaty mechanics.

TFSA vs RRSP

A TFSA and an RRSP solve overlapping but genuinely different problems, and the right one to prioritize depends heavily on your current marginal tax rate versus your expected rate in retirement, plus how soon you might need the money. An RRSP contribution is tax-deductible today and taxed on withdrawal; a TFSA contribution gets no upfront deduction but is never taxed again, on the growth or on withdrawal, for any reason. Neither one is universally "better" — see TFSA vs RRSP for Market Investors for the full decision framework, and use the RRSP vs TFSA Calculator to model the actual after-tax outcome of each option against your own contribution amount and tax bracket, rather than relying on a rule of thumb.

Why the growth projection matters

Every dollar of room you use isn't just sheltered from tax on the way in — growth inside a TFSA is never taxed again, on any of it, for as long as the money stays in the account, and not even when you eventually withdraw it. That's a meaningfully different deal from an ordinary taxable brokerage account, where dividends and realized gains get taxed every year they occur (see the Capital Gains Tax Calculator for what that actually costs). The growth projection above isn't decoration; it's a concrete answer to "what is my unused room actually worth if I stop leaving it empty" — the gap between the projected balance and what you'd have contributed is tax-free growth that a taxable account of the same size would have handed a meaningful slice of to the CRA along the way.

Every default, and why it's set where it is

• Birth year — 1990. Places someone's 18th birthday in 2008, before the TFSA's 2009 launch — a common case, and one that shows the calculator crediting full room from 2009 onward rather than from age 18, since 2009 is the later of the two dates for this example.
• Total ever contributed — C$0, total withdrawn — C$0. A clean starting point that shows maximum available room before you overwrite it with your own contribution history.
• Growth projection return — 7% nominal. The same long-run planning assumption used across this site's other growth calculators — see the Compound Interest Calculator's FAQ for the reasoning and caveats behind that number. It is fixed here (not user-editable) to keep this page focused on room, not on return assumptions; use the Compound Interest Calculator directly if you want to stress-test the return rate itself.
• Years to project — 20. Long enough to show compounding visibly separating your remaining room from a flat line, without turning the tool into a full retirement planner — that job belongs to the Retirement Calculator.