A shorted paycheck rarely gets sorted out through memory alone. It gets sorted out with paperwork: pay stubs, tax withholding forms, and the deposit records an employer used to send money to the IRS. Those documents only help a worker if they still exist somewhere, and how long they have to exist is set by a federal recordkeeping rule the IRS just restated. The number is four years, and it decides whether a wage question from a couple of years back can be checked against something firmer than two people’s competing memories.
The IRS’s payroll-week reminder pins the number at four years
On September 4, 2026, the IRS issued IR-2026-105, a reminder timed to National Payroll Week, observed September 7 through 11 this year. The occasion is built to recognize payroll professionals, but the agency used it to restate a short list of employer responsibilities that rarely make headlines on their own: withhold the correct amount from every paycheck, deposit federal payroll taxes electronically, file the right employment tax returns on schedule, and keep the records proving all of it actually happened.
Buried in that list is the line this piece is built around. The IRS states plainly that employers should keep all records of employment for at least four years, spelled out in the IRS’s National Payroll Week reminder. IRS Chief Executive Officer Frank Bisignano tied the observance to the agency’s ongoing job of helping payroll professionals “meet their responsibilities with confidence,” and recordkeeping made the short list of what those responsibilities include.
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What “records of employment” actually includes
The four-year floor isn’t limited to a drawer of old timesheets. It covers the entire paper trail a payroll department generates on a single employee: the Form W-4 filled out on day one and any later version filed when pay or life circumstances changed, the amounts withheld for federal income tax, Social Security and Medicare, the electronic deposits made to the IRS, and the employment tax returns filed to report all of it, including Forms 940, 941, 943, 944 and 945.
Each of those pieces answers a different question. The W-4 shows what an employee actually asked to have withheld. The deposit and return records show what the employer actually sent to the government. Four years from now, comparing the two is often the only way to tell whether a paycheck was shorted by a payroll mistake, a misapplied withholding election, or something else entirely.
Why the four-year floor matters when a paycheck comes up short
Wage questions rarely surface the same week a paycheck is issued. A worker might not notice a withholding error until a tax refund looks off the following spring, or a former employee might only realize a deduction was wrong after leaving the job entirely. The four-year rule is what keeps the underlying records available long enough for those delayed questions to be answered with documents instead of guesswork. Without it, a payroll department could legally discard the exact pay stub, W-4, or deposit record a worker would need to prove what happened.
That’s also why the rule sits inside a reminder aimed at both sides of the paycheck. The same release tells workers, separately, to check their withholding using the IRS Tax Withholding Estimator after a major life or income change. A worker can only act on what the estimator shows, though, if the employer’s own four-year-old records back it up once a question actually comes up.
The paper trail behind every deposit and return
For an employer, the detail behind this sits in Publication 15, the IRS’s core employer’s tax guide, which the same reminder points readers toward for a full rundown of federal employment tax duties. The IRS’s own summary of employer responsibilities runs through accurate withholding, electronic deposits, on-time filing of employment tax returns, and the four-year recordkeeping requirement together, treating them as one connected job rather than four separate ones.
None of this is new law. It’s the same standing rule the IRS enforces every year, restated on a schedule tied to National Payroll Week rather than tied to any single incident or investigation. That’s worth noting for anyone reading this as breaking news: nothing changed on September 4. The reminder just made an existing recordkeeping duty visible again, at a moment when payroll accuracy happens to be the specific thing being talked about.
What happens when an employer doesn’t keep the four years
The reminder doesn’t spell out a specific dollar penalty for a missing four-year-old timesheet, and this piece won’t invent one. What the rule does in practice is simpler, and for a worker often more useful than a fine: it sets the outer edge of how far back a wage question can be checked against real records rather than recollection. An employer that can’t produce a W-4, a deposit record, or a return from within that window has a harder time defending a payroll decision if it’s ever challenged, whether that challenge comes from an employee, a state agency, or the IRS itself.
For payroll professionals, the IRS keeps a running Payroll Professionals Tax Center with these same four responsibilities laid out in more detail. For everyone else, the practical takeaway from IR-2026-105 is narrower but concrete: the paperwork behind a paycheck is required to exist for four years, which is exactly how long a wage question about that paycheck can still be answered with something other than memory.
This article was produced with AI assistance and reviewed by a human editor. Figures are linked to their primary sources; where a claim could not be verified from the public record, we say so.
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