For most of your working life, the RRSP (Registered Retirement Savings Plan) rule is simple: contribute, let it grow, and don't touch it until you need it. It sounds responsible, and for decades it is.

But there's a hard deadline waiting at the end of that road, and a lot of Canadians meet it without a plan. By December 31 of the year you turn 71, your RRSP can no longer exist as an RRSP. You have three options, and only three.

• Convert it to a RRIF (Registered Retirement Income Fund)
• Use the balance to buy an annuity
• Fully de-register it, which the CRA can treat as fully taxable income in that one year

That third option is the one that quietly wrecks tax bills. Collapsing a $600,000 RRSP into a single year's income can push almost the entire balance into the top marginal bracket. Most people don't do that on purpose. They do it because they ran out of runway and didn't know the conversion was coming.

So most Canadians take the safe-looking route: convert to a RRIF, take the minimum, and move on. That avoids the one-year disaster. But "safe" and "optimized" are not the same thing. To show the difference, we built a clearly fictional but realistic profile and ran the deadline through Optiml.

The scenario: meet Gordon

Consider Gordon, a fictional Canadian who turns 71 in 2026. He lives in Ontario, his home is paid off, and he stopped working three years ago. Here's his picture heading into the deadline.

• RRSP: $620,000
• TFSA (Tax-Free Savings Account): $140,000
• Non-registered account: $180,000
• CPP (Canada Pension Plan) and OAS (Old Age Security): already started, roughly $24,000 combined per year
• Annual spending need: about $62,000 after tax

Gordon is in good shape. He's not worried about running short. His question is narrower and more interesting: now that the RRSP has to convert, what's the smartest way to draw it down so he keeps more of it over his lifetime instead of handing it to tax he didn't have to pay?

The default path: convert, take the minimum, repeat

The conventional move is to convert the full $620,000 to a RRIF and take only the mandatory minimum each year. It feels disciplined. It defers tax. What could be wrong with that?

Here's the mechanic most people miss. A RRIF forces a minimum withdrawal every year, calculated as a percentage of the account balance that climbs with age. At 71 the factor is modest. By the late 70s it's meaningfully higher, and it keeps climbing into the 80s. There is no maximum on a RRIF, but there is always that rising floor.

So a large RRSP left to grow inside a RRIF doesn't stay quiet. It compounds, the minimum percentage rises, and the forced withdrawals get larger every year, exactly when Gordon also has full CPP and OAS flowing. The "take the minimum" plan front-loads the smallest withdrawals into his lowest-income years and back-loads the largest forced withdrawals into years when his other income is already high.

That's where OAS clawback enters. OAS is reduced by 15 cents for every dollar of net income above an annual threshold (in the mid-$90,000s for 2026, and indexed upward each year). The clawback is assessed on the prior year's net income. A big forced RRIF withdrawal at 80 doesn't just get taxed at a high marginal rate. It can also trigger a clawback that pulls back the OAS Gordon was counting on.

The default path isn't a mistake. It's just a single-year decision repeated 20 times, with nobody looking at the whole horizon.

What Optiml's modelling surfaced

When we ran Gordon's full profile through Optiml, the platform didn't look at one year. It modelled every account, every year, across his entire retirement horizon, and sequenced the withdrawals to lower his lifetime tax bill rather than just this year's.

The conversion deadline doesn't change. The RRIF still has to exist by the end of the year he turns 71. What changes is the drawdown path. Three moves did most of the work.

• Fill the lower brackets early. Optiml drew more than the RRIF minimum in Gordon's early 70s, while his income was lowest, deliberately using up room in the first and second tax brackets before the forced minimums grew. This is the core idea behind the RRSP Meltdown strategy: pay tax on registered money at a low rate now instead of a high rate later.
• Route the overflow to the TFSA. Money pulled from the RRIF above what Gordon actually needed to spend didn't get consumed. It moved into his TFSA, where it grows and comes out tax-free, and crucially does not count toward the OAS clawback threshold.
• Sequence the other accounts around it. Optiml decided when to lean on the non-registered account versus the RRIF each year, smoothing taxable income so no single year spiked into clawback territory.

One detail worth knowing: RRIF minimum withdrawals are not subject to withholding tax, but any amount above the minimum is. That doesn't change the total tax owed, it just changes timing and cash flow, and Optiml accounts for it so the numbers reflect what actually lands in Gordon's account.

The before and after, modelled

Here's the comparison Optiml produced. These figures are illustrative, drawn from Gordon's fictional profile to show the shape of the difference, not a promise about your own numbers.

Across a full retirement horizon, the kind of tax efficiency Gordon's optimized path captured falls in the range Optiml users typically see when they sequence their accounts deliberately: roughly 3 to 15 percent of lifetime tax, depending on the size and mix of accounts. The bigger the RRSP relative to everything else, the more the conversion decision matters.

Why a single year doesn't tell you the answer

The trap with the RRSP-to-RRIF deadline is that the obvious choice looks great in year one. Take the minimum, defer the tax, keep your income low. Of course that wins, this year.

But retirement isn't one year. It's the whole runway. The minimum-only path wins early and loses late, because it pushes the largest forced withdrawals into the years when CPP, OAS, and a fat RRIF balance all stack on top of each other. The optimized path takes a little more tax early to avoid a lot more tax later, and protects OAS along the way.

This is exactly the difference Optiml is built to show. Compare Plans lets you put the minimum-only path and the meltdown-style drawdown side by side and watch the lifetime numbers move. The CPP & OAS Optimizer confirms whether your benefit timing still makes sense once the RRIF draws are layered in. And your Success Score, stress-tested against 50 market scenarios drawn from over 50,000 generated return paths, tells you whether the optimized plan still holds up if the markets don't cooperate.

The Bottom Line

Turning 71 forces a decision whether you plan for it or not. The deadline is fixed: by December 31 of that year, the RRSP converts. What you control is everything after, the path you draw it down, the brackets you fill, the OAS you protect, and the amount you carry forward.

The default isn't wrong. It's just unexamined. When you actually run the math across your whole horizon instead of one year at a time, the smarter path usually looks a little different from "take the minimum."

You don't have to guess at it. You can see it.