Why is my paycheck smaller than I expected?
Usually one of about six things, and most of them are fixable this month.
Tax year 2026. Last reviewed .
First, work out how big the gap really is
Before hunting for a cause, get a baseline for what your paycheck should be. A meaningful share of "my paycheck is too small" turns out to be an expectation built on dividing salary by pay periods and forgetting that tax exists at all.
| Gross pay | $2,115.38 |
|---|---|
| Federal income tax | -$170.00 |
| Social Security | -$131.15 |
| Medicare | -$30.67 |
| Pennsylvania income tax | -$64.94 |
| Take-home pay | $1,718.62 |
That is $44,684.12 a year, or 81.2% of the salary. Single filer, no pre-tax deductions. Computed with the same engine as the calculator.
If your actual cheque is close to a figure like that, nothing is wrong. If it is well below, the rest of this page is the list of usual suspects.
The usual causes
- Your filing status on the W-4 is wrong, or you left it as the default. This changes withholding more than anything else on the form.
- You have two jobs and did not complete Step 2 of the W-4, so each employer is withholding as though it were your only income — which usually means too little, not too much, and shows up as a bill rather than a small cheque.
- Benefits started. Health insurance, dental, vision and 401(k) deductions often begin a cheque or two after you do, so the drop is new deductions rather than new tax.
- You asked for extra withholding in Step 4 and forgot, or it carried over from a previous situation.
- Your state changed. If you moved, or work in a different state from the one you live in, you may be paying a state you did not expect — or two.
- A local tax applies. Some cities and counties levy their own income tax on top of the state, and it will not appear on any federal estimate you used.
Bonuses are withheld differently
If the small cheque was a bonus, or the pay period containing one, this is usually the explanation. Bonuses are supplemental wages, and employers commonly withhold them at a flat rate rather than running them through your normal W-4 calculation.
That flat rate is often higher than your actual marginal rate, which is why bonuses feel punitively taxed. They are not taxed more — they are withheld more. The excess comes back when you file. Each state guide lists that state's own supplemental rate, which is frequently different again from the federal one.
Some deductions stop partway through the year
Social Security is only charged on wages up to an annual cap. If you earn above it, the deduction stops once you reach the cap and your take-home rises for the rest of the year — then resets in January, which feels like a pay cut but is not one.
| Tax | Rate | Applies to | Source |
|---|---|---|---|
| Social Security | 6.2% | Wages up to $184,500 a year. Nothing above that. | SSA 2026 Cost-of-Living Adjustment Fact Sheet / Contribution and Benefit Base read 2026-07-18 |
| Medicare | 1.45% | Every dollar of wages. There is no upper limit. | IRS Publication 15 (2026), Circular E, section 9 read 2026-07-18 |
| Additional Medicare | 0.9% | Wages over $200,000 a year, on top of the Medicare rate. Employers apply this by wages alone, whatever your filing status. | IRS Publication 15 (2026), Circular E, Additional Medicare Tax withholding read 2026-07-18 |
Medicare has no cap, so it keeps coming out all year, and above a wages threshold an additional amount applies on top.
What to do about it
- Compare two consecutive payslips line by line. Whatever changed is on that list, and payroll systems label things consistently even when the labels are cryptic.
- Check gross minus every deduction equals net exactly. If it does not reconcile, something is mislabelled and worth raising.
- File a new W-4 if the cause is withholding. It takes effect within a pay period or two.
- Check your state and locality are right, especially after a move or a remote-work change.
For the numbers behind your own state — the rate schedule, what its form asks, and whether a city takes a share — start here: