Biweekly vs Semi-Monthly Pay
They sound like the same thing and they are not. One gives you 26 paychecks a year, the other 24.
The same salary, four ways
$60,000.00 a year, single filer, federal withholding and FICA only.
| Frequency | Paychecks | Gross each | Take-home each | Take-home a year |
|---|---|---|---|---|
| Weekly | 52 | $1,153.85 | $945.15 | $49,148.00 |
| Every 2 weeks | 26 | $2,307.69 | $1,890.31 | $49,148.00 |
| Twice a month | 24 | $2,500.00 | $2,047.83 | $49,148.00 |
| Monthly | 12 | $5,000.00 | $4,095.67 | $49,148.00 |
The last column is the same on every row. That is the point: how the year is sliced changes each cheque, never the total.
The three-paycheck months
This one only happens on a biweekly schedule. 26 paychecks across 12 months is 2.17 a month, so the extra dates have to land somewhere — twice a year a month catches three of them.
It is not extra money. Those two months are bigger because the other ten were smaller. But it is worth knowing when they fall, because a budget built on "two paychecks a month" quietly under-counts your year by two cheques.
Which months depends on where your first payday of the year lands, and it shifts every year. Count 14 days forward from that date and see which two months end up with three.
Does it change your tax?
Not over the year. Withholding is worked out by annualising your pay, running it through the IRS Publication 15-T schedule, then dividing back down by the number of pay periods. Change the number of periods and each cheque changes; the annual total does not move.
That is why the last column in the table above is identical on all four rows — and a useful sanity check on any paycheck calculator.
Questions
- Is biweekly the same as twice a month?
- No. Biweekly means every 14 days, which works out to 26 paychecks a year because there are 52 weeks. Semi-monthly means two fixed dates each month — usually the 15th and the last day — which is 24 paychecks a year. Two fewer cheques, each one bigger.
- Which one pays more?
- Neither. On a $60,000.00 salary you take home $49,148.00 a year either way. Semi-monthly gives you $157.53 more per cheque, but two fewer cheques, and it cancels out exactly.
- Why do I get three paychecks in some months?
- Only on a biweekly schedule. 26 paychecks spread across 12 months is 2.17 a month, so twice a year a month catches three pay dates. It feels like a bonus, but it is the same annual pay — the other ten months just had two.
- Which months have three paychecks?
- It depends on which day of the year your first payday falls. Count 14 days forward from your first payday of the year and keep going: the two months that end up with three dates are your three-paycheck months. They shift every year.
- Does the pay schedule change how much tax is withheld?
- Not over the year. Federal withholding is worked out by annualising your pay, applying the Publication 15-T schedule, then dividing back down by the number of pay periods. Change the number of periods and each cheque changes, but the annual total does not.