How to Calculate Overtime Pay (Time-and-a-Half and Double Time)

The rule of thumb: sort every hour into a bucket

Under US federal law, non-exempt workers get at least 1.5 times their regular rate for hours past 40 in a workweek. You do not need to memorize every state rule to check a paycheck, but you do need to know which bucket each hour belongs to before doing any math.

Some states add daily overtime rules. California, for example, requires overtime for hours past 8 in a day. Double time at 2 times the regular rate is usually employer policy, union contract, or holiday rules rather than the baseline federal overtime rule.

The three-bucket method

Once the hours are sorted, the math is three simple lines:

• Regular hours × regular rate
• Overtime hours × regular rate × 1.5
• Double-time hours × regular rate × 2

Add the three lines together. That is the gross pay for the week before taxes and deductions. Keeping the buckets separate makes it much easier to compare against a pay stub, because most stubs line up regular, overtime, and double-time pay separately.

Worked week: $20 an hour, 50 hours total

This is the default example in the Overtime Calculator. The worker earns $20 an hour and logs 40 regular hours, 10 hours at 1.5x, and 0 hours at 2x.

The time-and-a-half rate is $20 × 1.5, or $30 an hour. Ten hours at that rate is $300. The week total is $1,100 gross for 50 hours.

The blended rate is the real per-hour number

It is tempting to say the 10 overtime hours “paid $30 an hour,” but that is not what the whole week paid. The number that tells you what your time actually earned is the blended rate:

Total pay ÷ total hours

Here, $1,100 ÷ 50 = $22.00 an hour. That, not $30, is what the week really paid per hour worked.

The blended rate matters because it keeps overtime in context. A large overtime check can look rich while the average hourly return is much closer to the regular rate. Use the Overtime Calculator if you want the blended rate shown automatically for your own hours.

Scaling weekly pay honestly

A week with overtime does not turn into a month by multiplying by 4. A month is about 4.33 weeks, not 4. The honest formulas are:

• Monthly = weekly × 52 ÷ 12
• Annual = weekly × 52

If every week looked like the example, the math is:

• Monthly: $1,100 × 52 ÷ 12 = $4,766.67
• Annual: $1,100 × 52 = $57,200

Using weekly × 4 would give $4,400 a month, which quietly undercounts by about 8%. That gap is real money over a year, so use 4.33 weeks for monthly scaling when you are budgeting from an overtime-heavy week.

The overtime tax myth

Overtime is taxed at the same rates as regular pay. The federal income tax system does not have a separate overtime bracket. What changes is withholding.

Payroll systems often annualize a big overtime check, which can make the withholding rate look higher on that one paycheck. That is an over-withholding issue, not a higher tax rate on overtime income. The difference settles at tax time through your refund or balance due.

When a large overtime check hits, the paycheck may be smaller than expected even though the gross pay is correct. That is why it helps to separate the gross check you earned from the take-home amount that lands in your bank.

Checking a pay stub line by line

The practical way to audit a pay stub is to recompute the three buckets from your own hours log and compare line by line. Start with the total hours in each category, then compare the rates, then compare the gross pay in each bucket.

If your time log has clock times instead of decimal hours, the Hours Calculator turns clock times into decimal hours and handles overnight shifts that wrap past midnight. That is useful when a stub needs auditing shift by shift.

For the gross-to-take-home half, use the Paycheck Calculator after you confirm the gross pay. It helps you see what should arrive after withholding and deductions, which keeps the two questions separate: “Did I earn what I should have earned?” and “Was the right amount withheld?”

The three-bucket method keeps the audit simple. Regular hours at the regular rate, overtime hours at 1.5 times the rate, double-time hours at 2 times the rate. If the stub does not match your log, you have the exact line to question.