When Contributing to an RRSP Is Beneficial

5 min Tax Byte

An RRSP can be especially beneficial when your tax bracket is higher today than you expect it to be in retirement. This is because RRSP contributions reduce your taxable income now, which can create tax savings or a refund, while withdrawals are taxed later as income. If you withdraw the money in retirement at a lower tax rate, you may pay less tax overall.

A simple rule of thumb is: if your current tax bracket is higher than your expected retirement tax bracket, consider contributing to an RRSP. If your tax bracket is expected to be the same or higher in retirement, a TFSA may be more beneficial because TFSA withdrawals are tax-free and do not increase taxable income in retirement.

·         RRSP may be better: You are earning a high income now, expect a lower income in retirement, and can use or reinvest the tax refund.

·         TFSA may be better: You are in a low tax bracket now, expect to be in a similar or higher tax bracket later, or want flexible tax-free withdrawals.

·         Using both can make sense: If you have enough savings capacity, contributing to both an RRSP and a TFSA can provide tax flexibility in retirement.

This is a general guideline only. The best choice can also depend on factors such as income-tested benefits, employer matching, available contribution room, retirement income sources, and whether you need access to the money before retirement.

Simple Math Example: Same Tax Bracket Now and in Retirement

Assume you have $1,000 of pre-tax income to save, your tax rate is 30% today, your tax rate is also 30% in retirement, and the investment doubles over time.

RRSP: You contribute the full $1,000 before tax. It doubles to $2,000. When you withdraw it in retirement, you pay 30% tax, or $600. Your after-tax amount is $2,000 - $600 = $1,400.

TFSA: You first pay 30% tax on the $1,000 of income, leaving $700 to contribute. The $700 doubles to $1,400. TFSA withdrawals are tax-free, so your after-tax amount is $1,400.

Result: If the tax rate is the same when contributing and withdrawing, the RRSP and TFSA are equal in this simplified example: both end with $1,400 after tax. The important assumption is that the RRSP tax refund is saved or invested, not spent.

Simple Math Example: Tax Rate Is Higher Now Than in Retirement

Assume you have $1,000 of pre-tax income to save, your tax rate is 40% today, your tax rate will be 20% in retirement, and the investment doubles over time.

RRSP: You contribute the full $1,000 before tax. It doubles to $2,000. When you withdraw it in retirement, you pay 20% tax, or $400. Your after-tax amount is $2,000 - $400 = $1,600.

TFSA: You first pay 40% tax on the $1,000 of income, leaving $600 to contribute. The $600 doubles to $1,200. TFSA withdrawals are tax-free, so your after-tax amount is $1,200.

Result: When your tax rate is higher now than in retirement, the RRSP comes out ahead in this simplified example: $1,600 after tax versus $1,200 from the TFSA. The RRSP advantage comes from deducting income at a high tax rate now and paying tax later at a lower rate.

 

Simple Math Example: Tax Rate Is Higher in Retirement Than Now

Assume you have $1,000 of pre-tax income to save, your tax rate is 20% today, your tax rate will be 40% in retirement, and the investment doubles over time.

RRSP: You contribute the full $1,000 before tax. It doubles to $2,000. When you withdraw it in retirement, you pay 40% tax, or $800. Your after-tax amount is $2,000 - $800 = $1,200.

TFSA: You first pay 20% tax on the $1,000 of income, leaving $800 to contribute. The $800 doubles to $1,600. TFSA withdrawals are tax-free, so your after-tax amount is $1,600.

Result: When your tax rate is higher in retirement than it is today, the TFSA comes out ahead in this simplified example: $1,600 after tax versus $1,200 from the RRSP. The TFSA advantage comes from paying tax at the lower rate now and avoiding tax on withdrawals later.

How Will I Know if My Tax Bracket Will Be Higher in Retirement?

To estimate whether your tax bracket may be higher in retirement, do not look only at the regular income tax brackets. Retirement tax planning is different from working-year tax planning because government benefits and credits can change the effective tax rate on each extra dollar of income.

One major factor is the Old Age Security recovery tax, often called the OAS clawback. If retirement income is above the OAS recovery threshold, each additional dollar of income can cause 15 cents of OAS to be repaid. In British Columbia, a retiree with income around the OAS clawback zone may already be in a combined federal and provincial marginal tax bracket above 30%. Adding the 15% OAS clawback can push the effective marginal rate close to 50% on some retirement income.

This matters because RRSP withdrawals and RRIF withdrawals are taxable income in retirement. If those withdrawals occur while you are in the OAS clawback range, they may not only be taxed at the normal marginal rate, but may also reduce your OAS. By contrast, TFSA withdrawals are tax-free and do not increase taxable income, so they do not trigger OAS clawback.

Other retirement-specific credits can also affect the calculation. For example, the age amount tax credit is income-tested, meaning it may be reduced as income rises. As a result, two people with the same regular tax bracket may still face different effective tax rates depending on whether credits are being reduced or benefits are being clawed back.

·         Estimate guaranteed retirement income: workplace pension, CPP, OAS, and any other recurring taxable income.

·         Add expected RRSP or RRIF withdrawals: these are taxable and may push income into a higher bracket or into the OAS clawback range.

·         Check income-tested benefits and credits: OAS clawback and the age amount credit can make the retirement effective tax rate higher than the regular bracket suggests.

·         Compare the effective rate: if the expected retirement effective tax rate is higher than the tax rate saved by contributing to an RRSP today, prioritizing TFSA contributions may make more sense.

This chart compares effective tax brackets before and after age 65 with effective tax brackets in retirement, using combined British Columbia and federal tax rates as well as income tested benefits such as GIS, Age amount and OAS claw backs.

It's best to stay in the green zone and keep your retirement taxable income under 100k a year; otherwise, you quickly end up in the 50% plus tax brackets.

Example: Nurse with a Strong Municipal Pension

Consider a nurse who expects to receive a municipal pension of $6,000 per month, or $72,000 per year. If she also receives full CPP and OAS, her taxable retirement income could move into or near the OAS clawback zone before any RRSP or RRIF withdrawals are added.

In that situation, additional RRSP or RRIF income in retirement could be taxed at a high effective rate (50% or higher) because it may face regular income tax plus OAS claw backs. If her working-year tax rate is not meaningfully higher than this expected retirement effective rate of 50% or more , an RRSP contribution today may not provide a strong long-term benefit.

For this type of retiree, it may be a good idea to prioritize TFSA contributions first. A TFSA does not create a tax deduction today, but it also does not create taxable income later. That can be valuable when retirement income is already high enough to reduce OAS or other income-tested credits.

Another solution to the RRSP or TFSA is the self made pension or the Smith Manoeuvre™. These two strategies are tax negative (generate tax returns) during the working years and may be superior to the RRSP and TFSA under the right circumstances.

Summary

The main decision between contributing to an RRSP or a TFSA depends on the tax rate saved today compared with the effective tax rate expected in retirement. If your tax rate is higher today than it will be in retirement, an RRSP can be beneficial because you receive a deduction at the higher rate and pay tax later at a lower rate. If your tax rate is expected to be the same, the RRSP and TFSA can produce the same after-tax result, assuming the RRSP tax refund is saved or invested. If your tax rate is expected to be higher in retirement, the TFSA can be more beneficial because withdrawals are tax-free and do not increase taxable income.