Savings withdrawals fill the gap between your spending target and everything else, so GIS rises when withdrawals come from a TFSA and falls when they come from an RRSP or RRIF.
How this is worked out, and what it leaves out
Savings grow at the return you choose after inflation until you retire, then you draw what is needed to reach your spending target after CPP, OAS, GIS and any work pension. CPP and OAS are indexed to inflation, so everything is in today's dollars. GIS and the OAS recovery tax are re-worked every year using your CPP, work pension and the taxable part of your withdrawals.
Not included: income tax (the spending target is before tax), investment fees and market ups and downs, one-time costs such as care, a house sale, partner scenarios after a death (use the CPP Survivor calculator), and GIS rules that exempt some employment income. Treat the result as a conversation starter, not a plan.
Your privacy. What you enter is used only to produce this page. It is not saved, stored in a database, emailed or shared, and it is gone when you close or leave the page.
Information only. Estimates in 2026 dollars, before tax. Not tax, legal, financial or pension advice. Service Canada sets your actual benefits.
Rates reviewed November 2, 2026. CPP: January 2026 maximums. OAS/GIS/Allowance: October to December 2026 rates. Not for Quebec residents (QPP rules differ).
This free tool is a courtesy of HJ Wu & Company Inc. (CPA), a Vancouver CPA firm offering accounting, tax, financial reporting and review assurance. Tell us what you think of the calculators too.