Federal Retiree Senior Deduction Calculator (CSRS/FERS)
Enter your age and income below. The estimate applies the same Schedule 1-A math as your federal return — no tax software, no signup.
The short answer: Denise — at the scenario numbers pre-loaded below, the OBBBA deduction is $5,220, worth about $1,148 in federal income tax at a 22% marginal rate ($44 per biweekly paycheck). Exact figures update live as you change the inputs.
Must be 65+ to qualify
Modified Adjusted Gross Income
Senior Bonus Deduction
$5,220
⚠ Reduced from $6,000 due to income phase-out
⚠️ This calculator provides estimates for informational and educational purposes only. It is not tax advice. Results are based on the One Big Beautiful Bill Act (OBBBA) and IRS Schedule 1-A. Consult a qualified tax professional for your specific situation.
The Rules That Decide Your Number
CSRS pensions are fat and mostly taxable — which makes the phase-out the main event: at $88,000 single, the 6% slope has already eaten nearly $800 of the $6,000. FERS retirees with a TSP annuity face the same cliff later. The strategy lever: delaying the first RMD or bunching a Roth conversion into a pre-65 year both lower future MAGI and restore deduction room.
The full rules, caps and phase-outs for every deduction are in one table on the OBBBA rules page.
Worked Example
Denise, 70, retired from a CSRS-covered agency and draws $88,000 of pension MAGI.
- • Deductible amount: $5,220
- • Federal income tax savings: $1,148 (at the 22% marginal rate)
- • Per biweekly paycheck: $44
The deduction is above-the-line, so it stacks on your standard deduction automatically — nothing to itemize, nothing to elect.
Keep Reading
Frequently Asked Questions
How much phase-out hits a CSRS pension at $88,000 MAGI?
The senior deduction falls 6% of MAGI above $75,000: $13,000 over means $780 off, leaving $5,220 of the $6,000. The deduction reaches zero at $175,000 MAGI (single).
Do I need to itemize deductions to claim the $6,000 senior deduction?
No. The senior deduction is an above-the-line adjustment on Schedule 1-A, so it applies even if you take the standard deduction (which most seniors do).