Personal Finance
How To Calculate A Paycheck
Gross pay is what you earn; net pay is what reaches your bank account. The gap is income tax, payroll taxes and any retirement or benefit contributions, and it is often large enough to change how you budget.
Quick Answer
Net pay = gross - income tax - payroll tax - contributions
- gross
- Salary before any deductions
- taxRate
- Effective income tax rate
- payroll
- Social insurance rate such as FICA
- contribution
- Retirement or benefit deduction
Take the annual gross salary, subtract income tax, then subtract payroll taxes, then subtract any retirement contribution, and divide the remainder by the number of pay periods. On 72,000 with 12% income tax, 7.65% payroll tax and a 5% retirement contribution, net pay is roughly 54,252 a year, or 2,089 per biweekly period.
What Is A Paycheck?
A paycheck starts as gross pay, the amount you earned before anything is taken out. From that figure the employer withholds income tax, social insurance contributions and any benefit deductions you signed up for, and the remainder is net pay, the amount you actually receive.
Income tax withholding is an estimate based on the brackets and the information you gave on your tax form. It is not a final calculation, so if too much is withheld you get a refund when you file, and if too little is withheld you owe a balance.
Payroll taxes are separate from income tax. In the United States these are the social security and Medicare contributions, together known as FICA, which total 7.65% of wages up to a cap on the social security portion. Other countries have equivalent schemes under different names.
Retirement contributions reduce taxable income in many systems. A traditional pre-tax contribution comes out before income tax is calculated, so it lowers the tax you owe as well as building your retirement balance, while a Roth-style contribution comes out after tax.
The number of pay periods changes the per-paycheck figure but not the annual one. Monthly pay gives twelve checks, semi-monthly gives twenty-four, biweekly gives twenty-six and weekly gives fifty-two. Dividing the annual net by the right number is the only correct way to get a per-paycheck amount.
Biweekly pay is a common source of confusion because twenty-six periods do not divide evenly into twelve months. Two months each year contain three paychecks, and those are the months when a careful budget can catch up or get ahead.
Health insurance premiums and other benefit deductions usually come out before or after tax depending on the plan. A pre-tax premium lowers taxable income; a post-tax premium does not. The difference over a year can be substantial.
The effective tax rate is not your bracket. If your top bracket is 22% but your average across all income is 14%, the 14% figure is the one that matters for estimating take-home pay, because it reflects tax across every slice of income.
State and local income taxes vary enormously. Some places charge nothing, others charge a substantial rate on top of the national one. Ignoring them badly overstates net pay in high-tax jurisdictions.
Withholding tables are designed to approximate the tax you will owe, but bonuses, overtime, a second job or a mid-year raise can throw the estimate off. Checking the withheld total against your expected liability before year end avoids a surprise.
Net pay is the number to budget from. Fixed costs such as rent and loan payments should be planned against net pay, not gross, and the difference between the two is often enough to explain why a budget that looked fine on paper feels tight in practice.
The first paycheck of a new job is often lower than later ones. Some employers prorate the first period for the days worked, and some delay a period or two before the first payment. Neither reflects the steady-state figure, so avoid budgeting from it.
Formula
Gross = salary (or hourly rate x hours)
The full amount earned before any deduction.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| S | Salary | currency | Annual or periodic pay before deductions. |
Net = gross - income tax - payroll tax - contributions
Subtract each deduction from gross to find take-home pay.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| t | Income tax rate | rate | Effective income tax rate. |
| p | Payroll tax rate | rate | Social insurance contribution rate. |
| c | Contribution rate | rate | Retirement or benefit deduction rate. |
How To Calculate A Paycheck
- 1
Start from gross pay
Use the annual salary, or the hourly rate multiplied by the hours in the period, as the figure before any deduction.
- 2
Subtract income tax
Apply your effective income tax rate, not your marginal bracket. The effective rate reflects tax across all income and is the better estimate.
- 3
Subtract payroll taxes
Apply the social insurance rate, such as 7.65% for FICA in the United States, remembering that part of it caps out at a wage ceiling.
- 4
Subtract contributions
Remove any retirement or benefit contribution. A pre-tax contribution reduces the taxable base, so apply it before the income tax step for accuracy.
- 5
Divide by pay periods
Divide the annual net by twelve for monthly, twenty-six for biweekly, or the appropriate count, to get the amount per paycheck.
Examples
Example 1: 72,000 gross with standard deductions
- Gross salary
- 72,000
- Income tax rate
- 12%
- Payroll tax rate
- 7.65%
- Retirement contribution
- 5%
- Pay periods
- 26
| Step | Calculation | Result |
|---|---|---|
| Income tax | 72000 x 0.12 | 8,640 |
| Payroll tax | 72000 x 0.0765 | 5,508 |
| Retirement contribution | 72000 x 0.05 | 3,600 |
Result: Income tax is 8,640, payroll tax is 5,508 and the retirement contribution is 3,600, so deductions total 17,748 and the annual net is 54,252, or about 2,087 per biweekly paycheck across 26 periods.
Example 2: The same salary paid monthly
- Gross salary
- 72,000
- Income tax rate
- 12%
- Payroll tax rate
- 7.65%
- Retirement contribution
- 5%
- Pay periods
- 12
| Step | Calculation | Result |
|---|---|---|
| Annual net | 72000 - 17748 | 54,252 |
| Monthly net | 54252 / 12 | 4,521 |
Result: The annual net is unchanged at 54,252, but paid monthly it is 4,521 per paycheck rather than the biweekly figure.
Calculator
Net per paycheck
$2,086.62
- Annual net pay
- $54,252.00
- Total deductions
- $17,748.00
- Deduction rate
- 2465.00%
Values update as you type. This calculator covers the single scenario its formula assumes — see Common Mistakes for what it leaves out.
Prefer a full-width tool? Open the A Paycheck calculator page.
Common Mistakes
Budgeting from gross pay
Fixed costs have to be paid from net pay. Planning rent and loan payments against the gross figure leaves a budget that cannot be met.
Using the marginal bracket as the tax rate
Your top bracket applies only to the last slice of income. The effective rate, which is lower, is what actually determines take-home pay.
Dividing by twelve when paid biweekly
Biweekly pay gives twenty-six checks, not twenty-four. Dividing by twelve overstates each check and hides the two three-paycheck months.
Ignoring state and local taxes
In high-tax jurisdictions these can be a substantial part of the gap between gross and net. Leaving them out overstates net pay badly.
Forgetting that withholding is an estimate
Bonuses, overtime and job changes shift the true liability. Check the withheld total before year end to avoid a surprise balance due.
Missing the pre-tax order of operations
A pre-tax retirement contribution comes out before income tax is calculated, so it reduces the tax as well. Treating it as post-tax understates the benefit.
Treating the first paycheck as normal
A prorated first period or a payroll delay makes the first check unrepresentative. Budget from the steady-state figure once it settles.
FAQ
What is the difference between gross pay and net pay?
Gross pay is the amount earned before deductions. Net pay is what remains after income tax, payroll taxes and benefit contributions, and it is the figure that reaches your bank account.
Why is my first paycheck smaller?
Employers often prorate the first period for the days actually worked, and some delay the first payment by a cycle. The steady-state amount is usually higher once the schedule settles.
How many paychecks do I get in a year?
It depends on the cycle. Monthly gives twelve, semi-monthly gives twenty-four, biweekly gives twenty-six and weekly gives fifty-two. Biweekly pay produces two months with three checks.
Do retirement contributions reduce my tax?
A traditional pre-tax contribution lowers taxable income, so it reduces the income tax you owe as well as building your retirement balance. A Roth-style contribution comes out after tax and does not.
What are payroll taxes?
Social insurance contributions, called FICA in the United States, which fund social security and Medicare. They are separate from income tax, apply at a flat rate, and part of the charge stops once wages pass a cap.
Why is my refund different from what I expected?
Withholding is an estimate. Overtime, bonuses, a second job or a mid-year change in circumstances all shift the true liability away from what was withheld during the year.
References
- [1]Internal Revenue Service, Tax withholding estimator — https://www.irs.gov/individuals/tax-withholding-estimator
- [2]Social Security Administration, Payroll taxes — https://www.ssa.gov/oact/cola/cbb.html
- [3]U.S. Department of Labor, Understanding your paycheck — https://www.dol.gov/general/topic/wages