When Your Paycheck Doesn't Add Up: What to Check First

Start by comparing your pay stub to your offer letter or most recent pay conversation

A paycheck error usually falls into one of three categories: the hours recorded don't match what you worked, the rate of pay changed without your knowledge, or deductions were added that shouldn't be there. Before you contact anyone, pull out the written offer or contract you signed, your most recent pay stub, and the current one that looks wrong. Line them up side by side.

Look first at gross pay — the amount before taxes and deductions. Multiply the hourly rate you agreed to by the hours listed on the stub. If you're salaried, check that the gross matches what was promised. If those numbers don't match what you see, you've found the problem. If gross pay is correct but your take-home is smaller than expected, the issue is in the deductions.

Key Takeaways

• Compare your pay stub's gross pay (before deductions) to your offer letter or contract to spot whether the error is in hours, rate, or deductions.
• Federal and state tax withholding changes when you update your W-4 form, change jobs, or have a major life event — check whether you recently made a change.
• Contact your payroll or HR department in writing (email counts) with the specific numbers that don't match, and keep a copy of what you send.
• If your employer doesn't correct the error within one pay period, file a wage claim with your state's labor department — most states have a free process.
• You can request a manual check or direct deposit correction while the investigation happens; you don't have to wait for the next regular payday.

Check whether you changed your W-4 or had a major life event recently

Tax withholding — the money taken out for federal income tax — changes when you fill out a new W-4 form. If you got married, had a child, started a second job, or claimed a dependent in the past few months, your withholding should have changed. If you recently updated your W-4 at your current job, that's likely why your take-home is different.

State income tax withholding works the same way. Some states use a W-4, others use their own form. If you moved to a new state or changed your state residency status, your state withholding will shift. Social Security and Medicare taxes (FICA) are fixed percentages and don't change unless your gross pay changed, so if those line items look wrong, the issue is usually in how your hours or rate were recorded.

Identify whether the error is in hours, rate, or deductions

Look at the "hours worked" or "hours paid" line on your pay stub. Does it match the hours you actually worked? If you're hourly and worked 40 hours but the stub shows 35, that's a clear error. If you're salaried, this line may just show your standard hours and won't change week to week.

Next, check the hourly rate or salary amount listed. Does it match what you were hired at? If you were promised a raise or a different rate and it hasn't appeared, that's a separate issue from a calculation error — but it still needs to be corrected. Finally, scan the deductions section. Look for anything you don't recognize: health insurance, retirement contributions, garnishments, or other withholdings. If a deduction appeared that you didn't authorize, that's a red flag.

Contact your payroll department with specific numbers in writing

Send an email to your payroll or HR department. Include the pay period dates, your gross pay amount, the amount you received, and the specific line item that's wrong. For example: "My pay stub for the period ending March 15 shows 35 hours worked, but I worked 40 hours that week. My gross should be $800, not $700." Be factual and specific — don't assume or estimate.

Keep a copy of what you send and note the date. Payroll errors are common and usually fixable, so approach this as a problem to solve together rather than an accusation. Most employers correct honest mistakes within one pay period. If your employer says the error is correct and you disagree, ask them to explain in writing how they calculated the amount. You have the right to understand how your pay was determined.

Request immediate payment if the error delayed your money

While payroll investigates, you can ask for a manual check or a corrected direct deposit right away. You don't have to wait until the next regular payday to receive money you've already earned. Some employers will issue a same-day or next-day check for the difference; others may correct your direct deposit within 24 hours. Ask specifically: "Can you issue a manual check for the difference, or correct my direct deposit by [date]?"

Document this request in writing as well. If your employer refuses to pay you what you've earned while they investigate, that's a separate violation and should be reported to your state's labor department immediately.

File a wage claim with your state labor department if the error isn't corrected

If payroll doesn't correct the error within one pay period, or if they refuse to acknowledge it, contact your state's labor department or department of labor. Most states have a free wage claim process specifically for unpaid wages or calculation errors. You'll file a complaint with details about what you were owed, what you received, and what your employer said when you asked them to fix it.

The state will investigate at no cost to you. They may contact your employer, review your pay stubs and timesheets, and order repayment if they find an error. Some states also add penalties or interest if the employer was slow to correct a mistake. Search "[your state] wage claim" or "[your state] unpaid wages" to find the right department and form. You typically have between one and three years to file, depending on your state, so you don't have to rush — but filing sooner is better because it creates an official record.

Understand what you can and cannot do about tax withholding

If your take-home is smaller because of tax withholding, and you didn't authorize a W-4 change, that's a problem your employer created and they should fix. But if you did fill out a new W-4 or your withholding changed because of a life event, that's working as intended — it's not an error, even if it feels like a pay cut.

If you think your withholding is wrong because of a W-4 you filled out, you can fill out a new W-4 at any time to adjust it going forward. The IRS has a withholding calculator on their website (irs.gov) that can help you figure out the right amount. Changing your W-4 won't fix past paychecks, but it will change future ones. If you overpaid taxes and want a refund, that happens when you file your tax return.

Frequently Asked Questions

What if my employer says the error is my fault because I didn't report my hours correctly?

Your employer is responsible for recording the hours you worked, whether you report them or they track them. If there's a discrepancy, ask to see the timekeeping system or records they used to calculate your pay. You have the right to see how your hours were recorded. If the record is wrong, your employer must correct it and pay you for the hours you worked.

Can my employer take money back from a future paycheck to correct an overpayment?

It depends on your state. Some states allow deductions for genuine overpayments if the employee agrees in writing. Others require the employer to pursue overpayments through small claims court instead. Check your state's labor department website or call them to find out what's allowed where you live. If your employer deducts money without your permission, report it to your state labor department.

How long does it usually take to get a paycheck corrected?

Most employers correct simple errors — wrong hours, wrong rate — within one to two pay periods. If your employer needs to investigate or review timesheets, it may take longer. Ask your payroll department for a specific timeline when you report the error. If they can't correct it by the next payday, ask for a manual check or direct deposit for the difference in the meantime.

What if I think my employer is intentionally underpaying me?

Intentional wage theft is illegal. If you believe your employer is deliberately paying you less than you earned, file a wage claim with your state's labor department. You can also contact an employment lawyer for a free consultation — many work on contingency, meaning they only get paid if you win. Your state bar association can help you find one.

Do I need a lawyer to file a wage claim?

No. Wage claims are designed for workers to file without a lawyer, and the process is free. Your state labor department will investigate and can order your employer to pay you. If the amount is large or your employer retaliates, a lawyer can help — but you don't need one to start the process.