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PRORATED SALARY

Prorated Salary Calculator

Started or left partway through a month? Work out the gross on that partial paycheck the way payroll actually does it — working days by default — and, if it doesn't match your paystub, compare the calendar-day and annualized-260 methods until it does.

Prorate a partial-month salary Sample values shown — edit any field to calculate instantly.

Start from a common case:
$
Part-time? — optional; leave blank if full-time
of
Prorated pay
—
Enter your salary and your start date to calculate instantly.

This is your gross prorated pay — before tax. It is not your take-home.

Doesn't match your paystub? Compare methods

Employers use different day-count methods. Click the one that matches your paystub — the result and the steps below update to it.

Calculation method See the exact formula with your numbers

    The steps fill in with your own numbers as soon as you enter your salary and date. The default is the working-day method most US payroll uses.

    Why your number might differ

    There isn't one "right" way to prorate a salary

    US law fixes when a salary may be prorated, not how the days are counted — that's set by your employer's payroll software. Three methods dominate, and they give different numbers for the same month:

    Working days — Gusto / Rippling Monthly salary ÷ the Mon–Fri workdays in the month × the workdays you worked. The US mainstream, and the default here.
    Calendar days — UK / some US Monthly salary × (calendar days worked ÷ calendar days in the month). Common in the UK; a US minority.
    Annualized 260 — ADP / Paychex Annual salary ÷ 260 workdays × the workdays you worked. A fixed-year daily rate.

    ▲ Reconciling a paystub?

    You usually don't know which method your employer used — so start with the default, and if the figure is off, open Compare methods and click each until it matches. The audit card then shows the exact day count behind your number. This is gross pay; tax is separate and not calculated here. For a one-off proportional split that isn't a salary, use the generic pro rata calculator.

    How it's calculated

    Working days, by default

    prorated pay = (annual ÷ 12) ÷ workdays in the month × workdays you worked

    Workdays are Monday–Friday, counted by the engine for the exact month of your start (or last) date — no federal-holiday deduction, matching how Gusto, Rippling, and ADP-style payroll actually count. Switch to calendar days or annualized 260 under Compare methods if your employer uses one of those.

    Questions

    Frequently asked

    How do employers prorate a salary for a partial month?
    Most US payroll systems use working days: take the monthly salary, divide by the working days (Mon–Fri) in that month, and multiply by the days you actually worked. That's the default here. Some employers use calendar days or a fixed 260-workday year instead — switch methods under 'Compare methods' to match yours.
    Why does working-day vs calendar-day vs annualized-260 give a different amount?
    No method is legally required, so each divisor sets a different daily rate — calendar days give the lowest, working days count only business days, and 260 uses a fixed year. We show all three side by side so you can see which one your employer used.
    Why doesn't my prorated pay match my paystub?
    Almost always because your employer used a different day-count method. The big three are working days (Gusto, Rippling), calendar days (UK and some US employers), and annualized 260 (ADP, Paychex). Open 'Compare methods' and click each until the figure matches your paystub.
    How is a final paycheck prorated for someone leaving mid-month?
    The same way as a new hire, in reverse: count the days worked up to the last day, apply your chosen daily rate, and multiply. Enter the dates above to see the full formula on your own numbers.
    Does this include benefits, bonus, or PTO?
    No — this is prorated base salary only. Benefits, bonuses, and accrued PTO are handled separately under your company policy. We show exactly what is in the number so you can see what is not.
    Is this my take-home pay?
    No. This is gross prorated pay, before tax and deductions — your net take-home is lower. This tool does not calculate tax; use a paycheck calculator for net.

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