The 27-Paycheck Year

Roughly every eleven years a bi-weekly payroll produces twenty-seven paychecks instead of twenty-six. It is a calendar artefact, not a bonus, and how your employer handles it determines whether your paychecks get smaller.

Tax year 2026 · Updated 2026-08-29 · Guide

Why it happens

Fourteen days times twenty-six is 364 days — one day short of a year, two in a leap year. Those spare days accumulate, and about once a decade they push a twenty-seventh payday into the calendar year. Weekly payrolls hit the same problem with a fifty-third pay period.

It has nothing to do with tax law and everything to do with the fact that 365 is not divisible by 14.

The three ways employers handle it

Pay the extra check. Your annual salary stays the same per period and you receive one additional payment, so you are paid slightly more than your stated annual salary that year. Employees like this; finance departments less so.

Divide the salary by 27. Each paycheck is about 3.7% smaller and the annual total is unchanged. Legally clean, and reliably unpopular.

Adjust the pay calendar. Some employers shift a payday across the year boundary so the extra period falls into the following year instead.

Which approach applies should be in your employee handbook, and it should be announced well in advance. An employer switching from method one to method two without notice is the source of most 27-paycheck complaints.

Deductions are where it gets messy

Annual benefit amounts are usually divided across the expected number of pay periods. A health premium budgeted across twenty-six periods but deducted twenty-seven times over-collects by one period's worth.

Well-run payrolls suppress benefit deductions on the extra check or spread them across twenty-seven periods from the start. Less well-run ones do not, and employees end up owed a refund. Check your year-to-date deduction totals against your annual elections in December.

FSA and HSA elections are particularly worth checking, because an over-collection can push you past the annual contribution limit — $3,400 for a health FSA and $4,400 self-only for an HSA in 2026.

The tax effect is real but small

If you receive twenty-seven checks at the normal amount, your gross income for the year is higher and your tax rises accordingly. Withholding handles this automatically because the percentage method annualizes using the actual number of pay periods.

If the salary is divided by twenty-seven instead, each check is smaller and annualizes to the same salary, so withholding per check falls slightly. Either way there is no surprise at filing.

The exception is 401(k) contributions expressed as a fixed dollar amount rather than a percentage: twenty-seven deductions can push you over the $24,500 limit. Percentage-based elections scale automatically.

Frequently asked questions

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