Overtime Pay Calculator

One week's pay, both dials

Overtime arithmetic is simple twice over: regular pay is rate × hours, and overtime pay is rate × multiplier × overtime hours. The multiplier is where contracts differ — time-and-a-half (1.5×), double time (2×), or whatever a collective agreement states — and this page takes it as an input rather than assuming it. The output is a week's gross pay, broken into regular, overtime and total, so a payslip can be checked line by line against the contract's own arithmetic.

The panel prints the effective overtime rate too — what each overtime hour actually pays — because that rate, not the multiplier alone, is what a shift decision turns on.

A worked example, step by step

Problem: a warehouse role at 20 per hour, 40 regular hours plus 5 overtime hours at time-and-a-half.

1. Regular: 20 × 40 = 800.
2. Overtime rate: 20 × 1.5 = 30 per hour.
3. Overtime pay: 30 × 5 = 150.
4. Week total: 800 + 150 = 950.
5. Double-time variant: 5 hours at 2× pays 200, a week total of 1,000 — 50 more than time-and-a-half.

The same shape answers a second, sharper question: how much is the fifth overtime hour worth after tax? Gross arithmetic first — the tool's job — then your own marginal rate on top.

The multiplier ladder

For a 25-an-hour role, the same 40-hour week with 4 overtime hours at different multipliers:

The 28-an-hour row is a second full example: 28 × 40 = 1,120 regular, plus 8 overtime hours at 42 each = 336, total 1,456. The two multiplier rows on the same 25 rate differ by only 50 in the week — about 4% of gross pay — even though the overtime rate itself jumped by a third; contracts sometimes trade the multiplier against a plainly higher rate, and this table is how that trade gets priced.

Contract fine print worth checking

Three clauses change the arithmetic. The threshold: some pay overtime past 8 hours in a day, others past 40 in a week — the same hours can hit one, both or neither. The multiplier's basis: holiday hours and shift premiums sometimes already carry a premium, which stacks or caps the overtime rate. And eligibility: salaried and exempt roles are often outside overtime entirely, paid the same however the week runs. This tool computes the contract arithmetic it is given; whether the contract itself applies to a given week is the sentence above the payslip.

Mistakes that quietly underpay a shift

• Assuming 1.5× without checking. Some agreements pay 2× for Sundays or nights; the multiplier field exists so the received rate, not folklore, drives the maths.
• Computing overtime on a rounded-down rate. 20.50 entered as 20 costs 7.50 across 5 OT hours; enter the real rate.
• Comparing gross against net. The panel is gross; a side-gig quoted net must be grossed up before the comparison is fair.
• Forgetting premium stacking rules. Night differential plus overtime may or may not stack; the contract line, not instinct, says which.

Keep exploring

• Hourly to Salary Calculator — the yearly view of the same rate, before and after unpaid weeks.
• Loan Payment Calculator — what a steady weekly figure actually affords against a fixed repayment.
• Compound Interest Calculator — investing the overtime premium rather than spending it.
• Guide: How Loan Payments Work.