Why Is My Paycheck Less This Week? Common Causes and a Checklist

Why is my paycheck less this week? In most cases it is a new or bigger deduction, a change to your W-4, more tax withheld because the last check had overtime or a bonus, a move to a place with state or local income tax, fewer hours, or a different number of pay periods. The fastest way to find out is to lay two pay stubs side by side and compare them line by line.

Every dollar figure below uses the same example: a single filer earning $60,000 a year, paid every two weeks, in Texas. A plain paycheck is $2,307.69 gross and $1,938.08 take-home. To test your own change, run both versions through the paycheck calculator.

First, check gross pay

Start at the top of the stub. If gross pay went down, the cause is pay itself: fewer hours, unpaid time off, no overtime this period, a lost shift differential, or a lower rate. If gross pay is the same and net pay dropped, the cause is somewhere in the deductions or taxes. The gross pay vs net pay guide explains each line.

Benefit enrollment or a bigger 401(k)

Open enrollment changes usually start on the first check of the plan year. A new health plan, added family members, a 401(k) increase or a new HSA all lower take-home pay.

Change on the $60,000 Texas paycheck	Take-home pay	Drop
No deductions	$1,938.08
Start a 6% 401(k)	$1,816.23	$121.85
Add $100 a check of health premiums	$1,735.88	$80.35 more

Pre-tax deductions cost less than their face value because they also lower your tax. The $100 health premium only cuts take-home pay by $80.35. If your 401(k) is set as a percent of pay, a raise also raises the contribution.

You changed your W-4, or it changed for you

Any new Form W-4 moves federal withholding. On the example paycheck:

• Checking the Step 2 box for two jobs drops take-home pay from $1,938.08 to $1,793.27.
• Removing one child from Step 3, after they turn 17 for example, drops it from $2,022.69 to $1,938.08.
• Adding $50 of extra withholding in Step 4(c) takes exactly $50 more.

A W-4 that claims exemption from withholding only lasts for the year. If you don’t renew it, your employer has to withhold as if you were single with no adjustments, and the next check can drop a lot. The W-4 guide shows how each step works.

The last check had overtime or a bonus

If you compare against a paycheck that had overtime, this one will look smaller. A $25 an hour worker with 10 overtime hours in a two-week period takes home $1,992.16. With no overtime, the same worker takes home $1,690.85.

A bonus check works the other way. Many employers withhold federal tax on a bonus paid on its own check at a flat 22%. A $5,000 bonus in Texas loses $1,100 to federal tax, $310 to Social Security and $72.50 to Medicare, leaving $3,517.50. If a bonus or commission is added to a regular check instead, the whole check is taxed as if you earned that much every period, so withholding jumps. The bonus tax calculator shows both methods, and the FAQ on supplemental wages explains the rules.

A new state or local tax

Moving, or starting work in a new place, can add taxes that weren’t there before. The example paycheck in Texas is $1,938.08. The same pay in California is $1,838.71, because state income tax and state disability insurance take $99.36 more each check.

Local taxes do the same thing on a smaller scale. Cities such as New York, Philadelphia, Detroit and many in Ohio charge a local income tax, and some counties in Maryland and Indiana do too. If your employer just registered you for one, it shows up as a new line. See your state’s page from the states list, for example Ohio or Pennsylvania.

A different pay schedule

Same salary, more paychecks, smaller checks. If your employer moves you from twice a month to every two weeks, each check gets smaller because the year is split 26 ways instead of 24.

Pay schedule	Paychecks a year	Take-home per check on $60,000
Twice a month	24	$2,099.58
Every two weeks	26	$1,938.08
Weekly	52	$969.04

Your yearly take-home pay doesn’t change. On a two-week schedule, two months a year have three paydays, which can make a normal check feel low next to them.

Why your paycheck taxes went up in January

Higher earners see this one every year. Social Security tax is 6.2% of wages up to $184,500 in 2026, then it stops until January. Someone earning $250,000 paid every two weeks has no Social Security taken from the last several checks of the year, but does have $86.54 of Additional Medicare tax per check. On the first January check, Social Security of $596.15 comes back and the Additional Medicare stops. Net pay drops by $509.61 with no change in salary. The FICA guide explains the wage base.

January is also when benefit elections, new 401(k) limits and any new withholding tables take effect.

Other causes worth checking

• Wage garnishment for child support, a court debt or a tax levy. These come out after tax and should be labeled.
• A loan repayment from your 401(k).
• Union dues, parking or other after-tax deductions starting.
• A payroll mistake, such as the wrong filing status or a missed deduction stop date.
• Unpaid leave or a short pay period after a start or end date.

Pay stub checklist

Lay the old and new stubs next to each other and go through them in order:

1. Pay period dates and pay date. Are both stubs the same length?
2. Hours and rate. Any change in regular, overtime or other pay?
3. Gross pay. If it fell, the reason is pay, not tax.
4. Pre-tax deductions: 401(k), health, dental, vision, HSA, FSA.
5. Federal taxable wages. Did they change?
6. Federal income tax. A jump with the same taxable wages means a W-4 change.
7. Social Security and Medicare. Check whether Social Security restarted or Additional Medicare began.
8. State tax, state programs and local tax. Any new line?
9. After-tax deductions and garnishments.
10. Year-to-date totals, which catch one-time corrections.

If none of it explains the drop, ask payroll for a breakdown. The FAQ on why a paycheck is so low has a short version of this list, and the take-home pay guide walks through the math one step at a time.