Why did my paycheck change in January 2026?

Two common reasons. First, the IRS inflation-adjusted the federal tax brackets and the standard deduction for 2026, which changes federal withholding. Second, your year-to-date Social Security wages reset to zero on January 1, so Social Security tax restarts if it had stopped late in 2025 after you hit the wage base.

What is the 2026 standard deduction?

For tax year 2026 the standard deduction is $16,100 for single filers, $32,200 for married filing jointly, and $24,150 for head of household, per IRS Rev. Proc. 2025-32. A larger standard deduction reduces taxable income, which can slightly lower federal withholding.

Did the Social Security tax change for 2026?

The rate did not change — it is still 6.2% for employees. The wage base did: for 2026 Social Security tax applies to the first $184,500 of wages, up from $176,100 in 2025. Higher earners pay Social Security tax on more of their pay before it stops for the year.

How much can I contribute to a 401(k) in 2026?

The 2026 employee elective deferral limit is $24,500, up from $23,500 in 2025. The age 50+ catch-up is $8,000, and the SECURE 2.0 catch-up for workers aged 60 to 63 is $11,250. These figures come from IRS Notice 2025-67.

What Changed for Your 2026 Paycheck

Each year the IRS and SSA adjust the numbers that drive your paycheck. Here is what changed for 2026, why your take-home may look different, and where to verify each figure.

In short

For 2026, the IRS raised the federal tax brackets and the standard deduction for inflation ($16,100 single / $32,200 married filing jointly), the Social Security wage base rose to $184,500, and the 401(k) employee limit rose to $24,500. None of the tax rates changed — only the thresholds. Most paychecks see only a small change. Figures: IRS Rev. Proc. 2025-32 and IRS Notice 2025-67.

PayslipIQ provides educational information and estimated calculations only. It does not provide tax, legal, financial, accounting, employment, benefits, or payroll advice. PayslipIQ is not a CPA firm, law firm, financial advisor, payroll provider, or tax authority. Always verify your paycheck, deductions, withholdings, and tax position with your employer's payroll department, a qualified CPA, the IRS, your state tax authority, or another appropriately qualified professional. Calculations are estimates; your actual paycheck may differ based on factors specific to your employer, location, benefits elections, and personal tax situation.

Why your 2026 paycheck may look different

The federal tax rates (10, 12, 22, 24, 32, 35, and 37 percent) did not change for 2026. What changed is the income thresholds those rates apply to, plus the standard deduction. The IRS adjusts these every year for inflation. The result is usually a small change in federal withholding, not a dramatic one.

2026 federal income tax brackets (single filer)

Marginal rates apply to taxable income — gross pay minus the standard deduction or itemized deductions.

Rate	2026 taxable income (single)
10%	Up to $12,400
12%	$12,400 – $50,400
22%	$50,400 – $105,700
24%	$105,700 – $201,775
32%	$201,775 – $256,225
35%	$256,225 – $640,600
37%	Over $640,600

Married-filing-jointly brackets are exactly double the single figures through the 35 percent rate. Source: IRS Rev. Proc. 2025-32.

2026 standard deduction

Single: $16,100
Married filing jointly: $32,200
Married filing separately: $16,100
Head of household: $24,150

A higher standard deduction means slightly less of your pay is taxable, which can modestly reduce federal withholding.

Social Security and Medicare for 2026

The Social Security tax rate stays at 6.2 percent for employees. The wage base — the cap on wages that Social Security tax applies to — rose to $184,500 for 2026, up from $176,100 in 2025. Medicare stays at 1.45 percent on all wages, with the Additional Medicare Tax of 0.9 percent still applying to wages above $200,000 for single filers and $250,000 for married filing jointly.

2026 retirement and benefit limits

401(k) employee elective deferral: $24,500 (up from $23,500 in 2025)
401(k) catch-up, age 50+: $8,000
401(k) SECURE 2.0 catch-up, ages 60–63: $11,250
HSA contribution limit: $4,400 self-only, $8,750 family
Health FSA salary reduction limit: $3,400

Source: IRS Notice 2025-67 and IRS Rev. Proc. 2025-32.

What this means for your paycheck

If nothing else changed — same salary, same W-4, same benefits — most workers see only a small shift in take-home pay from the 2026 inflation adjustments. Bigger changes usually come from something specific to you: a raise, a new benefits election, a mid-year W-4 update, or Social Security tax restarting in January after you hit the wage base in late 2025.

To see your own numbers, run the paycheck calculator. To understand a change between two specific checks, see why your net pay changed.

Verify these figures

Always confirm current figures at the source: federal brackets and the standard deduction in IRS Rev. Proc. 2025-32, retirement limits in IRS Notice 2025-67, and the Social Security wage base at ssa.gov. PayslipIQ is independent and not affiliated with the IRS or SSA.

Frequently asked questions

Why did my paycheck change in January 2026?: Two common reasons. First, the IRS inflation-adjusted the federal tax brackets and the standard deduction for 2026, which changes federal withholding. Second, your year-to-date Social Security wages reset to zero on January 1, so Social Security tax restarts if it had stopped late in 2025 after you hit the wage base.
What is the 2026 standard deduction?: For tax year 2026 the standard deduction is $16,100 for single filers, $32,200 for married filing jointly, and $24,150 for head of household, per IRS Rev. Proc. 2025-32. A larger standard deduction reduces taxable income, which can slightly lower federal withholding.
Did the Social Security tax change for 2026?: The rate did not change — it is still 6.2% for employees. The wage base did: for 2026 Social Security tax applies to the first $184,500 of wages, up from $176,100 in 2025. Higher earners pay Social Security tax on more of their pay before it stops for the year.
How much can I contribute to a 401(k) in 2026?: The 2026 employee elective deferral limit is $24,500, up from $23,500 in 2025. The age 50+ catch-up is $8,000, and the SECURE 2.0 catch-up for workers aged 60 to 63 is $11,250. These figures come from IRS Notice 2025-67.