- Withdrawal order and benefit timing are worth tens of thousands in lifetime tax without changing a single investment.
- Drawing the RRSP down before the non-registered account often wins, because it shrinks the RRIF minimums and the deemed disposition waiting at the end.
- Delaying CPP to 70 pays 42% more per month for life, and it is usually the single largest lever in a Canadian plan.
- Old Age Security is clawed back above a net-income threshold, so the tax cost of a big RRIF year is higher than its marginal rate suggests.
How the decumulation planner works
Decumulation is the half of retirement planning nobody rehearses: turning an RRSP, a TFSA and a non-registered account into steady after-tax spending without handing more than necessary to the Canada Revenue Agency. The order you draw in, and the ages you start CPP and Old Age Security, are worth tens of thousands of dollars over a retirement.
Enter your balances, your spending target and your province, for one person or a couple, and the planner projects every year to life expectancy under a default order. Then it searches: different withdrawal orders, CPP start ages from 60 to 70, Old Age Security from 65 to 70, and pension income splitting between partners — scored against whichever goal you pick, the lowest lifetime tax, the largest estate, or the best chance the money lasts.
What comes back is a strategy, a lifetime tax figure, an after-tax estate and the year-by-year table behind them. The mandatory-minimum schedule further down is the constraint the whole exercise works around.
The math
The projection is annual and in nominal dollars. Balances grow at the return you set, the spending target rises with inflation, and each year mandatory income lands first — CPP, Old Age Security, any defined-benefit pension, and the RRIF minimum from 71. Whatever is still needed is withdrawn gross, solved so the after-tax remainder matches the shortfall, then drawn down the withdrawal order until it is met.
Tax is federal plus provincial brackets with the basic personal amount, the age amount and the pension income credit, plus the Old Age Security recovery tax on net income above the threshold. Registered assets roll over tax-free to a surviving partner; at the end of the last life the remaining RRSP or RRIF is taxed as a deemed disposition, which is why a plan that never touches the RRSP often loses.
The optimizer is a coordinate descent over the strategy variables, not an exhaustive search, so it returns a strong candidate rather than a proven optimum. Bracket thresholds are indexed forward from a frozen base year rather than the current published tables, Quebec pension rules are not modelled, and one deterministic return a year ignores sequence risk entirely.
Worked example
Take $600,000 in an RRSP, $150,000 in a TFSA and $150,000 non-registered with a $100,000 cost base, in Ontario, spending $75,000 a year and planning to 92 at a 5% return. Under the default order — cash, non-registered, RRSP/RRIF, TFSA — with CPP and Old Age Security both at 65, the plan pays about $195,800 of lifetime tax and runs out in its fifteenth year.
Ask it to minimize lifetime tax and it tries seventeen strategies and settles on a different one: draw the RRSP before the non-registered account, take Old Age Security at 67 and CPP at 70. Lifetime tax falls to about $163,100 — roughly $32,700 saved — and the money lasts a year longer. Nothing about the portfolio changed. Only the order and the claiming ages did.
Key terms
- Decumulation
- The drawdown phase of retirement — converting savings into after-tax spending. The mirror image of accumulation, and the part with far more tax decisions in it.
- RRIF minimum
- From the year you turn 71 an RRSP must become a RRIF and a set percentage of the January 1 balance has to be withdrawn annually, whether you need it or not. The schedule is tabulated below.
- Pension income splitting
- A couple can report up to half of eligible pension income — including RRIF withdrawals from 65 — on the lower earner’s return, moving income out of the higher bracket without moving any cash.
- Deemed disposition
- On the last death, whatever is left in an RRSP or RRIF is treated as ordinary income on the final return. It is the reason a large untouched RRIF is a tax bill in waiting rather than an untouched asset.