OAS Calculator Canada 2025
Estimate your Old Age Security pension, calculate clawback impact, and compare taking OAS at 65 vs deferring to age 70 for a 36% increase.
10 minimum for eligibility, 40 for full pension
Deferring increases pension by 0.6% per month (7.2%/year)
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Estimates based on 2025 OAS/GIS rates and clawback thresholds. OAS amounts are indexed quarterly to CPI. Not financial advice.
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How to Use This Calculator
Tab "Benefit Estimate"
Enter your years of Canadian residency (after age 18) and planned start age (65-70). See your monthly OAS benefit, whether it's full or partial, and the deferral bonus if applicable.
Tab "Clawback Calculator"
Enter your expected retirement income from all sources (pension, RRSP/RRIF, employment). See the OAS clawback (Recovery Tax) amount, your net OAS after clawback, and tips to reduce clawback.
Tab "Deferral Analysis"
Compare taking OAS at age 65 vs deferring to 66, 67, 68, 69, or 70. See monthly benefits at each age, cumulative totals over time, and the break-even age where deferral overtakes early claiming.
The Formulas
OAS monthly benefit (2025):
Age 65-74: $742.31/month (full pension)
Age 75+: $816.54/month (+10% supplement)
Partial pension:
Monthly = Full amount ร (years in Canada รท 40)
Minimum 10 years of residency required
Deferral bonus:
+0.6% per month deferred past 65 (max +36% at age 70)
At 70: $742.31 ร 1.36 = $1,009.54/month
OAS clawback (Recovery Tax):
Threshold: $93,454 net income (2025)
Clawback = 15% ร (net income โ $93,454)
Full clawback at ~$151,668 (age 65-74)
TFSA withdrawals don't count toward income
Age 65-74: $742.31/month (full pension)
Age 75+: $816.54/month (+10% supplement)
Partial pension:
Monthly = Full amount ร (years in Canada รท 40)
Minimum 10 years of residency required
Deferral bonus:
+0.6% per month deferred past 65 (max +36% at age 70)
At 70: $742.31 ร 1.36 = $1,009.54/month
OAS clawback (Recovery Tax):
Threshold: $93,454 net income (2025)
Clawback = 15% ร (net income โ $93,454)
Full clawback at ~$151,668 (age 65-74)
TFSA withdrawals don't count toward income
Example
Robert โ Retiring at 65, $110,000 Retirement Income (RRIF + Pension)
Full OAS at 65$742.31/month ($8,908/year)
Income above threshold$110,000 โ $93,454 = $16,546
Clawback (15%)$2,482/year ($207/month)
Net OAS received$535/month ($6,426/year)
If deferred to 70 (+36%)$1,010/month โ but same clawback
Frequently Asked Questions
For most Canadians, OAS enrollment is automatic โ Service Canada will send you a notification letter the month after you turn 64. If you don't receive this letter, you should apply. You can apply up to 12 months before you want to start receiving benefits. If you want to defer past 65, you need to notify Service Canada.
Yes, if you lived in Canada for at least 20 years after age 18. If you had 10-19 years, you can receive OAS only while living in Canada or in a country with a social security agreement. Payments are subject to a 25% non-resident tax withholding (which may be reduced by tax treaties).
Key strategies: draw from TFSA instead of RRSP/RRIF (TFSA withdrawals don't count as income), pension income splitting with spouse (transfer up to 50% of eligible pension income), timing RRSP withdrawals before age 65, and investing in tax-efficient assets that generate capital gains rather than interest income.
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