FTE Calculator (Full-Time Equivalent Employees)

The FTE formula, and the one number you have to choose first

Full-time equivalent is a capacity measure: total hours worked divided by what a full-time schedule is for the same period. Take the team this page starts with. Three full-timers at 40 hours plus part-timers at 20, 28 and 12 hours is 120 plus 60, which is 180 hours a week. Divide by 40 and you get 4.50 FTE from six people. Annually it is the same arithmetic on bigger numbers: 9,360 hours divided by 2,080.

The part most FTE calculators skip is that the divisor is yours to set. 40 hours a week (2,080 a year) is the common US convention, but 35 and 37.5-hour standard weeks are widespread, and public sector and university schedules often differ again. Change the divisor and every downstream figure moves with it: labor cost per FTE, revenue per FTE, grant effort percentages, budget headroom. A 175-hour team is 4.38 FTE at a 40-hour week and 5.00 FTE at 35. Neither is wrong, but reporting one while your budget assumes the other is.

A month is not four weeks, and a lot of third-party FTE content gets this wrong. Converting weekly hours to monthly means multiplying by 52 and dividing by 12, about 4.333. Using 4 understates monthly hours by roughly 8%, which is more than enough to move an ACA count across a threshold. This page converts at 52/12 everywhere and never rounds the intermediate figures.

FTE math is only as good as the hours going into it. If you are working from paper timesheets or punch clock exports, the Timesheet Hours Calculator turns clock-in and clock-out times into the weekly or monthly hour totals this page needs.

The IRS version: how the ACA counts full-time equivalent employees

Switch this page to the IRS method and the same team produces a different number, for three reasons.

First, the ACA sets its own full-time line: an employee averaging at least 30 hours of service a week during a calendar month, or at least 130 hours of service in that month, is a full-time employee. Each one counts as 1.0 and leaves the part-time pool entirely. Your 40-hour definition does not enter into it, which is why the full-time hours field locks in ACA mode.

Second, everyone below that line goes into a pool with a cap. You combine the hours of service of all non-full-time employees for the month, counting no more than 120 hours per person, then divide the total by 120. The cap is why a per-person ledger matters: two part-timers at 60 and 180 hours a month are not the same as two at 120. The 180-hour one is a full-time employee at 1.0, and an averaged input would report them both as ordinary part-timers.

Third, the rounding. Add the month's full-time employees to that month's FTEs, average the twelve monthly totals across the prior calendar year, and round the result down to the next lowest whole number. The IRS worked example lands on 47.5 and rounds to 47, which is under the line, so that employer is not an applicable large employer. Rounding to nearest would have made them one.

None of that sounds dramatic until you run it. A 40-person office with a dozen 25-hour part-timers crosses 50 without hiring anyone. Those part-timers contribute roughly 108 hours a month each, which is 10.8 FTEs on top of 40, for an average near 50.8.

The statutory test is twelve separate monthly calculations on the prior calendar year, averaged at the end. A web form cannot collect twelve months of hours for every employee, so this one computes a single representative month and projects it across the year. That is why the verdict says "likely" and never states a determination. If you land anywhere near the line, run the real month-by-month test using the IRS page on determining if an employer is an applicable large employer or the worksheet in Publication 5208.

What crossing 50 FTE actually changes

Passing 50 makes you an applicable large employer for the following calendar year. Two things follow. The employer shared responsibility provisions require you to offer minimum essential coverage that is affordable and provides minimum value to full-time employees and their dependents, or risk a payment. And you have to file Forms 1094-C and 1095-C, reporting what was offered to each full-time employee month by month.

There is a real escape hatch. If your workforce exceeded 50 full-time employees including FTEs for 120 days or fewer during the calendar year, and the employees who pushed you over the line during that stretch were seasonal workers, you are not an ALE. Retailers and agricultural employers lean on this one regularly. Going the other way, the aggregation rules treat commonly owned or affiliated businesses as a single employer for the count, so three restaurants under one ownership group are tested together, not separately.

Plenty of other employee-count thresholds get confused with this one, and none of them uses the same math. The section 45R small business health care tax credit needs fewer than 25 FTEs, counted with a 2,080-hour cap and divisor and with owners, more-than-2% S corporation shareholders, more-than-5% C corporation shareholders and their family members excluded. SHOP coverage is generally for employers with 50 or fewer employees. FMLA kicks in at 50 employees within 75 miles, but that is a headcount test, not an FTE test, so ten half-time staff count as ten people there and five FTEs here. As for PPP loan forgiveness FTE, with its 1.0 cap and 0.5 simplified method, that program ended in 2021 and its rules do not apply to anything current.

Turning FTE into a payroll number

FTE tells you capacity. It does not tell you cost, and the gap between the two is where budgets go wrong. Two teams at 10.0 FTE can carry very different payroll bills, because some employer taxes scale with headcount rather than hours.

FUTA is the clearest case. It applies to the first $7,000 of each employee's wages, per person, so twenty part-timers cost roughly twice the FUTA of ten full-timers working the same total hours. State unemployment tax works the same way against its own wage base. Benefits eligibility, workers compensation classifications and payroll processing fees often follow headcount too. That is the practical reason to look at both figures side by side rather than picking whichever one flatters the plan.

To go from an FTE count to real money, the Employer Cost of an Employee Calculator prices what one FTE actually costs once the FICA match, FUTA, SUTA and benefits are in. The Multi-Employee Payroll Total Calculator runs the whole team's payroll rather than just the headcount, and the Labor Cost Percentage Calculator turns that capacity into labor cost as a share of revenue.

The hard part of any FTE count is rarely the arithmetic. It is having per-employee hours and year-to-date wages in one place when someone asks. That is what WorkLogs44 Payroll Calculator is for: it holds per-employee hours, wage-base totals and employer taxes all year, so come January the numbers this page needs are already sitting there.