RRSP vs 401(k): The Cross-Border Retirement Account Guide

Canadians and Americans have almost mirror-image retirement account systems, which is great unless you've lived in both countries and are trying to figure out what to do with what. RRSPs and 401(k)s solve the same problem — let you save pre-tax for retirement, pay tax later — but they're different enough in the details that moving between them (or comparing them) is genuinely confusing. This article lays out both side by side.

The Big Idea Both Accounts Share

Both RRSPs and 401(k)s are tax-deferred retirement accounts. That's the part that matters. You contribute pre-tax money now (reducing your current tax bill), the money grows tax-free inside the account for decades, and you pay income tax when you eventually withdraw it in retirement.

The idea is that most people are in a lower tax bracket in retirement than during their working years, so deferring tax now and paying it later saves you money. Whether that's actually true for you depends on your income now vs later, but the basic framework is the same on both sides of the border.

Side-by-Side Comparison

Feature

RRSP (Canada)

401(k) (US)

Sponsor

Self-directed (you open it)

Employer-sponsored

2026 contribution limit

18% of earned income up to $33,810

$24,500 employee

Catch-up 50+

None (but room carries forward)

+$8,000 (total $32,500)

Employer match

Sometimes (group RRSP)

Very common

Investment options

Anything you want

Limited to plan menu

Withdrawal age

Any age (with tax)

59½ without penalty

Mandatory conversion

RRIF at 71

RMDs start at 73

Contribution Limits: How Much You Can Put In

401(k) contribution limit (2026): $24,500 from the employee, with an additional $8,000 catch-up for anyone 50 or older. Employers can contribute on top of that, up to a combined limit of $72,000. If you're 60–63, there's an even higher "super catch-up" of $11,250 (via SECURE 2.0).

RRSP contribution limit (2026): 18% of your earned income in the prior year, up to a dollar cap of $33,810. Unlike 401(k)s, Canadian RRSP room is calculated individually and is printed on your Notice of Assessment from the CRA each year. Unused contribution room carries forward indefinitely — if you didn't use your $10,000 of room last year, you can use it this year, or 30 years from now.

The Canadian system gives more flexibility (unused room never expires), while the US system gives higher absolute dollar limits. Someone contributing the max each year can put away more in a 401(k), but someone who had lean years early in their career can claw back room in a way that 401(k) participants can't.

Employer Matching: The 401(k) Wins Here

One area where the 401(k) dominates is employer matching. A significant majority of US employers that offer 401(k)s also offer a match — most commonly "100% match on the first 3% of salary" or "50% match on the first 6%." That's free money on top of your contribution.

If you earn $80,000 and your employer offers a 100% match on the first 5% of your salary, they'll contribute $4,000 on top of whatever you put in. That's a 100% instant return on the money you had to contribute to trigger it — there's no investment strategy on earth that beats that.

Canadian employers sometimes offer "group RRSPs" with matching, but it's less universal. If you're in Canada and your employer does offer a match, it's just as valuable — grab it.

The universal rule: always contribute enough to get your full employer match before you worry about any other retirement account. Not contributing is equivalent to refusing a portion of your compensation.

Investment Options: RRSPs Win

401(k)s are limited to whatever funds your employer's plan administrator chooses. Some plans are excellent, offering low-cost index funds and target-date funds. Some plans are terrible, offering only actively-managed mutual funds with 1%+ expense ratios. You don't get to choose.

RRSPs are self-directed. You can open one at any major Canadian brokerage (Questrade, Wealthsimple, TD, RBC) and hold essentially any investment you want inside it: stocks, ETFs, mutual funds, bonds, GICs. Cost is whatever the underlying investment costs — which, if you pick low-cost index ETFs, can be under 0.10% per year.

This is a real advantage for RRSP holders. Your cost structure can be a fraction of what a high-fee 401(k) charges, without any negotiation with your employer.

Withdrawal Rules

401(k) withdrawals: You can't pull money out without penalty before age 59½. Early withdrawals are taxed as ordinary income AND hit with a 10% early withdrawal penalty. There are exceptions (hardship withdrawals, 72(t) substantially equal periodic payments, the Rule of 55 for separation from service), but they're narrow.

RRSP withdrawals: You can withdraw at any age. But the withdrawal is immediately subject to withholding tax (10–30%) and the full amount is added to your taxable income for the year. This is a horrible idea outside of retirement — you'd essentially pay double-digit tax and lose the contribution room permanently.

Two notable RRSP exceptions where early withdrawals are allowed without tax:

Home Buyers' Plan (HBP): Withdraw up to $60,000 to buy your first home. You have to repay it over 15 years or it becomes taxable.

Lifelong Learning Plan (LLP): Withdraw up to $20,000 for full-time education. Repayable over 10 years.

These are unique to RRSPs — there's no equivalent early-withdrawal provision for 401(k)s without penalty.

Mandatory Conversions at Old Age

RRSP: By December 31 of the year you turn 71, your RRSP must be converted to a RRIF (Registered Retirement Income Fund) or used to buy an annuity. Once it's a RRIF, you're required to withdraw a minimum percentage each year (starting at ~5% at age 71 and rising over time). These withdrawals are taxed as income.

401(k): Required Minimum Distributions (RMDs) start at age 73. Similar to RRIF math — you're forced to withdraw a minimum amount each year, calculated from IRS tables. Also taxed as ordinary income.

Both systems force retirees to eventually pay the deferred tax. You can't defer forever.

Cross-Border: What If You Move Countries?

This is where things get messy, and where you genuinely need professional advice.

Canadian moving to the US: Your RRSP can stay in Canada. Under the Canada-US tax treaty, the US recognizes RRSPs as tax-deferred and won't tax the growth (but you must file Form 8891 or equivalent to make an election). You can't contribute to an RRSP without Canadian earned income. You probably can't transfer an RRSP into a 401(k) or IRA — the tax hit would be brutal.

American moving to Canada: Your 401(k) can stay in the US. Canada recognizes 401(k)s as tax-deferred under the treaty. Rolling a 401(k) into an IRA (US to US) is simpler than trying to move it into Canada. You can't contribute to a 401(k) without US earned income.

Neither system lets you easily move money to the other side. Cross-border retirees usually end up with accounts on both sides of the border. A cross-border tax accountant is essentially mandatory.

Which Is Better?

Comparing the two as if you could choose is slightly silly — usually you just have access to whichever one your country offers. But here's the honest assessment:

The 401(k) wins on employer matching. Free money from your employer is the single most valuable feature of any retirement account, and 401(k) matches are widespread.

The RRSP wins on flexibility. Self-directed investments, low fees if you choose low-cost ETFs, unused room that never expires, and the HBP for first-time home buyers.

Both lose to Roth IRA / TFSA for most people once you're at lower contribution levels. Tax-free growth beats tax-deferred growth most of the time, especially for people whose tax bracket won't drop much in retirement. That's why the standard order of operations is: (1) 401k/RRSP to the employer match, (2) max Roth IRA/TFSA, (3) back to 401k/RRSP for the rest.

The Bottom Line

RRSPs and 401(k)s do the same thing in slightly different ways: they let you push retirement savings into a tax-deferred account, grow them for decades, and pay tax on the way out. The structural details — contribution limits, employer matches, investment options, withdrawal rules — make them not-quite-mirror-images.

If you're an American working a traditional job, contribute enough to your 401(k) to capture the full employer match. If you're a Canadian self-employed or without a group RRSP, open one at a discount brokerage and fill it with low-cost index ETFs. If you're either one of those and you haven't maxed out your Roth IRA or TFSA first, you're doing it in the wrong order.