In payroll, “arrears” means money that’s owed but hasn’t been paid yet. The term covers two different situations. The first is a matter of routine timing: most American workers are paid in arrears, meaning the paycheck arrives after the work period ends rather than on its last day. The second is a specific shortfall — a missed wage, an uncollected benefit premium, or a court-ordered withholding that a paycheck couldn’t fully cover. Both meanings live under the same word, and both show up regularly on pay stubs.
Being Paid in Arrears
When your employer pays in arrears, you work first and get paid later, usually one to two weeks after the pay period closes. A Friday check typically covers the previous week or two-week stretch, not the days you’re working that same Friday. The lag is deliberate: it gives payroll time to verify timecards, calculate overtime, and finalize tax withholdings before money goes out.
That processing window matters most for hourly workers. The Fair Labor Standards Act requires at least one-and-a-half times your regular rate for every hour past 40 in a workweek.1eCFR. 29 CFR Part 778 – Overtime Compensation An employer paying “current” — cutting a check on the last day of the period based on estimated hours — would have to guess at overtime and then issue corrections whenever the guess was wrong. Paying in arrears sidesteps that cycle.
So if you’re new to a job and your first paycheck feels late, that’s usually the arrears schedule at work, not an error. You’re being paid for a period that has already ended.
Wage Arrears: Missed Pay and Retroactive Raises
Wage arrears are specific amounts your employer owes you but didn’t include in an earlier paycheck. A missed shift that wasn’t recorded, a miscalculated shift differential, or a data-entry error that shorted your hours all create wage arrears. So does a retroactive raise: when a new rate takes effect for hours already worked at the old rate, the difference becomes an arrear the employer has to pay out.
Employers usually resolve these by adding the missing amount to your next regular paycheck. Federal law pushes them to move quickly. Under the FLSA, an employer that fails to pay owed minimum wages or overtime can be liable for the unpaid amount plus an equal sum in liquidated damages, effectively doubling the bill.2Office of the Law Revision Counsel. 29 U.S. Code 216 – Penalties A court may reduce the liquidated damages if the employer proves the violation was made in good faith, but the default remedy is the full doubled amount.3U.S. Department of Labor. Civil Money Penalty Inflation Adjustments
One tax note worth knowing: back pay is taxed in the year you actually receive it, not the year the work was performed. A lump sum paid in 2026 for a raise retroactive to 2025 shows up as 2026 income on your W-2.4Internal Revenue Service. Publication 957, Reporting Back Pay and Special Wage Payments to the Social Security Administration
Deduction Arrears: When Withholdings Don’t Fit the Check
Deduction arrears build up when your paycheck is too small to cover everything that’s supposed to come out of it. This happens most often during unpaid leave or in any pay period where reduced hours shrink your gross pay below the total of your scheduled withholdings. Health premiums, dental coverage, 401(k) contributions, and other benefit deductions can all fall into arrears when the check simply can’t absorb them.
Family and Medical Leave Act leave is a common trigger. During unpaid FMLA leave, your employer must keep your group health coverage active on the same terms as if you were still working, but you’re still responsible for your share of the premium.5eCFR. 29 CFR 825.210 – Employee Payment of Group Health Benefit Premiums Your employer may ask you to pay on the same schedule as a normal payroll deduction, follow a COBRA-style payment timeline, or agree to another arrangement. If premiums go unpaid during that time, the shortfall becomes a deduction arrear that payroll typically recovers through catch-up deductions once you return to a full paycheck.
Garnishment Arrears
Court-ordered obligations can also fall into arrears. Child support, tax levies, and creditor judgments come with fixed withholding amounts, and when a check isn’t large enough to satisfy the full amount, the unpaid balance carries forward.
Federal law caps how much of your disposable earnings can be garnished in any workweek for consumer debts. The limit is the lesser of:
- 25 percent of your disposable earnings for that week, or
- the amount exceeding 30 times the federal minimum wage of $7.25 per hour — $217.50 per week.6Office of the Law Revision Counsel. 15 U.S. Code 1673 – Restriction on Garnishment
If your weekly disposable earnings fall at or below $217.50, no garnishment for consumer debt is allowed. Child support and alimony have higher limits: up to 50 percent of disposable earnings if you’re supporting another spouse or child, up to 60 percent if you’re not, with an extra 5 percent allowed when payments are more than 12 weeks overdue.7U.S. Department of Labor. Fact Sheet #30: Wage Garnishment Protections of the Consumer Credit Protection Act (CCPA) Federal and state tax levies are not subject to these percentage caps.
What Gets Paid First When the Check Is Short
When your paycheck can’t cover every deduction, the order in which items get paid matters, because whatever the check can’t cover becomes an arrear.
Mandatory withholdings come off the top: federal income tax, Social Security, and Medicare. After those, court-ordered obligations such as child support, alimony, and creditor garnishments generally take priority over voluntary items like health insurance premiums, 401(k) contributions, and union dues.8Office of Personnel Management. PPM-2008-01: Order of Precedence When Gross Pay Is Not Sufficient To Permit All Deductions Among the garnishments themselves, family support orders take priority over other withholding orders.9eCFR. 29 CFR 20.209 – Amounts Withheld
The practical effect: on a slim check, your child support order gets satisfied before your dental premium is deducted. The dental premium shortfall becomes a deduction arrear that payroll carries forward until a future paycheck is large enough to catch up.
Arrears on the Final Paycheck
When employment ends, all outstanding payroll balances come due at once. Your employer must pay any standard arrears from your final work period plus any wage arrears from earlier errors. Many states also require payout of accrued but unused vacation time, though those rules vary.
State deadlines for the final check vary widely. Some states require immediate payment on the day of an involuntary termination; others allow until the next regularly scheduled payday. Missing the deadline can trigger waiting-time penalties or liquidated damages in many states, in some cases up to 30 additional days of wages.
Employers may also try to recover deduction arrears from the final check — unpaid benefit premiums, prior overpayments, or advanced leave balances. The FLSA does not prohibit deducting a prior overpayment from wages, even without your written consent, and even several pay periods after the original error.10U.S. Department of Labor. FLSA2004-19NA – Compliance Assistance Two limits still apply, though: no deduction may reduce your earnings below the federal minimum wage of $7.25 per hour, and no deduction may cut into overtime compensation you’re owed.11U.S. Department of Labor. Fact Sheet #16: Deductions From Wages for Uniforms and Other Facilities Under the FLSA If the arrears exceed what can legally be pulled from the final check, the employer may ask you to sign a separate repayment agreement for the balance.