OAS Over Time
Optiml vs. No StrategyOAS preserved
Clawed back
What is this strategy?
OAS Clawback Reducer
The OAS Clawback Reducer is specifically built around one objective: protecting your OAS benefit. It is not focused on maximizing your after-tax estate or minimizing lifetime taxes. It looks at your desired after-tax income needs each year, builds your plan around that, and then structures your withdrawals so that once OAS begins, you are receiving as much of that benefit as mathematically possible. Depending on your income requirements, this strategy may eliminate clawbacks entirely, reduce them significantly, or confirm that your desired income level puts you above the threshold regardless.
The Optimizer
Optiml does not follow an order. It tests everything.
There is no preset withdrawal order. Every possible combination of deposits and withdrawals is evaluated against your specific financial plan.
What OAS Clawback Reducer Actually Means
One objective. Keep as much of your OAS as possible.
Like all strategies in Optiml, the OAS Clawback Reducer starts with your desired after-tax income needs each year and builds your plan around that. From there, its only focus is on structuring your withdrawals so that once OAS payments begin, you are receiving as much of that benefit as mathematically possible.
Depending on your income requirements and overall financial picture, the strategy may eliminate OAS clawbacks entirely, reduce them significantly, or in some cases confirm that your desired after-tax income simply puts you above the clawback threshold no matter what. In that scenario, Optiml gives you that clarity upfront and points you toward a strategy that better suits your situation, such as the Maximize After-Tax Estate or Maximize Spending strategies.
This strategy is not focused on your estate or lifetime taxes.
Its sole objective is to protect and maximize your OAS benefit each year, while ensuring you still receive the after-tax income you need. If your income requirements are simply too high relative to the OAS clawback threshold, this strategy will tell you that clearly.
OAS Clawback Reducer: Keeping What You Earned
Net Income
Structured to stay below the OAS clawback threshold
↓ Drawn Down
Below Threshold
RRSP / RRIF
Withdrawn at amounts that avoid pushing income over the limit
↓ Drawn Down
Clawback Managed
OAS Benefits
Protected as much as mathematically possible each year
↑ Growing
Maximized
Maximum OAS Benefit Retained
Every dollar of OAS you keep is money you earned
No two plans are ever the same. The OAS clawback outcome depends entirely on your income sources, account balances, withdrawal amounts, and the year OAS begins. Never a template.
Under the Hood
minimizing OAS clawback is not about one rule. It is about the entire income landscape.
OAS clawback works as a 15-cent surcharge on every dollar of net income above the annual threshold - on top of regular income tax. What makes it particularly tricky is the one-year lag: the clawback you pay this year is determined by your prior year's net income. Every income decision in your plan casts a shadow one year forward, affecting how much OAS you keep.
Optiml's non-linear optimization engine maps every combination of withdrawals, deposits, and account sequencing across your retirement years, treating each year's income as a variable with a delayed effect on the objective. Rather than applying a simple income cap each year, it finds the plan that minimizes the sum of all clawback across your entire retirement - accounting for mandatory minimums, future balance projections, and tax bracket boundaries simultaneously.
For larger registered balances, this often means drawing down slightly more in earlier low-income years - before CPP, OAS, and mandatory RRIF minimums stack up - to prevent future income from breaching the threshold. Withdrawals are never pushed into an excessively high marginal rate just to pre-deplete an account; the engine always weighs the tax cost of early withdrawals against the clawback benefit they protect.
The Objective
The optimizer minimizes the total OAS clawback recovered across all years of the plan:
Minimize: ∑ₜ Clawback_t
t = year index
Clawback_t = max(0, 0.15 × (NetIncome_{t-1} - Threshold_{t-1}))
The subscript t-1 reflects the prior-year lag in the OAS clawback rules: how much clawback you pay this year depends on your net income from the year before. The optimizer accounts for this lag directly, treating each year's income decisions as having a one-year delayed effect on the objective.
Every path must satisfy one principal constraint
Your income from all sources, minus all taxes, living expenses, goals, and deposits, must net to exactly zero each year. No path is accepted that leaves you short of what you need to live.
Income - Taxes - Expenses - Goals - Deposits = 0
The clawback objective is minimized subject to this constraint. No plan is accepted that reduces your OAS clawback at the cost of leaving you without the income you need.
Worth knowing before you choose this strategy
minimizing OAS clawback and maximizing your after-tax estate are not the same goal. By optimizing purely for OAS preservation, the engine may favor withdrawal patterns that reduce what you leave behind for your beneficiaries. If a strong legacy matters to you, the Maximize After-Tax Estate strategy also accounts for OAS clawback as part of its broader tax optimisation - and will often deliver the same after-tax income with a larger estate, making it the superior choice for most users who want both outcomes at once.
The result is a precise, year-by-year plan: exactly how much to withdraw and from which accounts, in amounts that keep your net income at or below the clawback threshold as often as mathematically possible - without ever compromising the after-tax income you need to live.
Is this strategy right for you?
Perfect Fit
Who This Strategy Is For
Your primary goal is to protect and maximize your OAS payments
You or your spouse are near or above the OAS clawback income threshold
You have already experienced OAS clawbacks and want to see if you can reduce or eliminate them
May Not Be Right If...
This Strategy May Not Be For You
You acknowledge that your after-tax income goal in retirement far exceeds the OAS clawback threshold
You are more focused on maximizing your after-tax estate or maximizing retirement spending
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