Compare & Plan
Raise Impact Calculator
Enter your current salary and raise amount — as a percentage or a flat dollar figure — and see a side-by-side paycheck breakdown: how gross pay, FICA taxes, and estimated net take-home change. Every number comes from the documented FICA formula so you can verify the math yourself.
Informational only — not financial advice. Covers FICA (Social Security & Medicare) only; does not calculate federal or state income tax withholding.
Enter your salary and raise amount above to see your take-home impact.
How this calculator works
Step 1 — New annual salary
For a percentage raise, the new annual salary is: current salary × (1 + raise% ÷ 100). For a flat dollar raise, it is simply current salary + raise amount. The equivalent percentage is shown so you can compare both inputs on equal footing.
Step 2 — Per-paycheck gross
Each salary is divided by the number of pay periods per year using exact arithmetic — annual ÷ 26 for biweekly, ÷ 52 for weekly, ÷ 24 for semi-monthly, ÷ 12 for monthly. No intermediate rounding is applied before the FICA calculation.
Step 3 — FICA on the new gross
Social Security is 6.2% of FICA-taxable wages up to the 2026 annual wage base of $184,500 (source: SSA Contribution and Benefit Base). Medicare is 1.45% on all FICA-taxable wages with no ceiling, per IRS Publication 15 (Circular E).
Section 125 deductions(health, dental, vision, FSA, HSA) reduce FICA-taxable wages, so they lower both the before and after Social Security and Medicare amounts. Your benefits premium doesn’t change when you get a raise — entering it here lets the calculator compute FICA on the correct taxable base instead of the full gross.
401(k) pre-tax contributions reduce your federal taxable income but do not reduce FICA-taxable wages. Including them shifts the estimated net take-home down equally in both columns — so the change column still shows your true raise impact.
Step 4 — The "Change" column
Each row’s Change value is simply After minus Before. For gross pay and net take-home, a positive change is income you gain. For FICA rows, a negative change means more tax is withheld — a natural consequence of earning more, not a miscalculation.
What this calculator doesn’t cover
A raise also changes how much federal and state income tax is withheld each paycheck — potentially pushing you into a higher marginal bracket or adjusting your W-4 withholding. Those calculations depend on your filing status, exemptions, and state of residence, and are explicitly out of scope here. The net take-home numbers shown are estimates based on FICA alone.
If your total annual earnings approach the $184,500 Social Security wage base, the Social Security tax shown may overstate mid-year amounts once you’ve hit the cap. Use the Paycheck Take-Home Calculator (which accepts YTD wages) for a mid-year view.
Last reviewed: June 2026
Frequently asked questions
How much does a 5% raise add to my paycheck?
It depends on your current salary and pay frequency. A 5% raise on a $60,000 salary adds $3,000 per year — about $115 more per biweekly paycheck gross. After Social Security and Medicare withholding, the net per-paycheck increase is roughly $106.
Does a raise change how much FICA I pay?
Yes. Social Security (6.2%) and Medicare (1.45%) both apply to the additional wages. If your wages already exceed the Social Security wage base ($184,500 in 2026), only Medicare increases on the additional earnings.
What is the difference between a percentage raise and a flat dollar raise?
A percentage raise scales with your current salary — 5% on $80,000 is $4,000. A flat dollar raise adds the same fixed amount regardless of your starting pay. The per-paycheck impact depends on which type you receive and your current pay frequency.
When will I see the raise reflected in my paycheck?
Your raise takes effect on the first payroll date after your employer's effective date. If the effective date falls mid-cycle, some employers pro-rate the first paycheck; others start the full new rate on the next complete pay period. Check with your payroll department for the exact timing.
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