To estimate payroll taxes, start with a baseline of 7.65% of each employee’s gross wages for the employer’s share of FICA (Social Security and Medicare). Then add Federal Unemployment Tax and factor in federal income tax withholding, which varies by employee. For a quick budget estimate, most small businesses can expect to pay roughly 10% to 15% on top of each employee’s gross salary in employer-side payroll taxes alone.
The Taxes You Need to Estimate
Payroll taxes fall into two buckets: taxes you withhold from the employee’s paycheck and taxes you pay out of your own pocket as the employer. Both matter when you’re estimating costs, but they hit your books differently.
Taxes withheld from the employee’s pay:
- Federal income tax, based on the employee’s W-4 form, filing status, and earnings
- Social Security tax at 6.2% of wages
- Medicare tax at 1.45% of wages
- Additional Medicare tax of 0.9% on wages above $200,000 in a calendar year
- State and local income taxes, where applicable
Taxes paid by the employer:
- Social Security tax at 6.2% of wages (matching the employee’s share)
- Medicare tax at 1.45% of wages (matching the employee’s share)
- Federal Unemployment Tax (FUTA), paid entirely by the employer
- State unemployment tax, rates vary by state and your claims history
The Additional Medicare tax on high earners has no employer match. You withhold it from the employee’s check, but you don’t owe a corresponding amount yourself.
Step 1: Calculate the FICA Portion
FICA (Federal Insurance Contributions Act) covers Social Security and Medicare. Combined, the rate is 15.3% of gross wages, split evenly between employer and employee at 7.65% each. For every $1,000 an employee earns, you withhold $76.50 from their paycheck and pay another $76.50 from your business funds.
Social Security tax applies only up to an annual wage base. Once an employee’s earnings for the year cross that cap, you stop withholding and matching the 6.2% Social Security portion. The wage base adjusts each year for inflation, so check the current limit on the IRS website or Social Security Administration site when running your numbers. Medicare tax has no wage cap and applies to every dollar of earnings.
Here’s a quick example. Say you pay an employee $60,000 per year. Your employer-side FICA cost is $60,000 x 7.65% = $4,590. That’s the amount you owe on top of the salary, before considering any other taxes.
Step 2: Add Federal Unemployment Tax
FUTA funds the federal unemployment system. The standard rate is 6.0% on the first $7,000 of each employee’s wages per year. However, if your state unemployment program meets federal standards (most do), you receive a credit of up to 5.4%, bringing the effective FUTA rate down to 0.6%. That works out to a maximum of $42 per employee per year.
Because the taxable wage base is so low, FUTA is a relatively small line item. But if you have many employees, it adds up. Ten employees at $42 each is $420. You’ll typically hit the $7,000 threshold early in the year for most workers, so FUTA costs are front-loaded in Q1.
Step 3: Estimate Federal Income Tax Withholding
Federal income tax withholding is the most variable piece of your payroll estimate. The amount depends on each employee’s gross pay, filing status, number of dependents, and any adjustments they claim on their W-4 form. Two employees earning the same salary can have very different withholding amounts.
You don’t pay this tax yourself. You withhold it from the employee’s wages and remit it to the IRS. But you still need to estimate it accurately because you’re responsible for depositing the correct amount on time. The IRS provides withholding tables (Publication 15) that show exactly how much to withhold for each pay period based on wages and W-4 information. Most payroll software handles this calculation automatically.
For budgeting purposes, if you’re trying to estimate total withholding across your workforce, a rough range of 10% to 25% of gross wages covers most employees. Lower earners and those with large families will fall toward the bottom of that range, while higher earners with fewer allowances will be near the top.
Step 4: Factor in State and Local Taxes
Most states impose their own income tax withholding, and many also charge a state unemployment insurance tax (SUTA) that the employer pays. SUTA rates vary significantly based on your state, your industry, and your experience rating, which reflects how many former employees have filed unemployment claims against your account. New businesses are typically assigned a default rate until they build a claims history.
Some states also levy disability insurance or paid family leave taxes that come out of employee wages, employer funds, or both. Check your state’s department of revenue and labor agency for the specific rates that apply to your business.
A Quick Formula for Employer Costs
If you want one number for budgeting your total employer-side tax burden per employee, here’s a simplified approach:
- FICA (employer share): 7.65% of gross wages
- FUTA (after credit): 0.6% of the first $7,000
- State unemployment: varies, but budget 2% to 5% of a state-defined wage base as a starting point
For a salaried employee earning $50,000, the math might look like this. Employer FICA: $3,825. FUTA: $42. State unemployment (estimating 3% on a $10,000 wage base): $300. Total employer-side tax cost: roughly $4,167, or about 8.3% of that employee’s salary.
Many business owners use a rule of thumb that employer payroll taxes add 10% to 15% on top of gross wages once you include all federal and state obligations. This range works well for initial budgeting. If you’re in a state with higher unemployment rates or additional employer-paid taxes, lean toward the higher end.
When to Run the Numbers More Precisely
The quick formula works for budgeting and forecasting, but you’ll need exact calculations when you actually run payroll. Three situations call for tighter numbers:
First, when an employee’s earnings approach the Social Security wage base. Once they cross it, you stop owing the 6.2% Social Security portion on additional wages, which lowers your per-paycheck cost for the rest of the year.
Second, when an employee earns more than $200,000. You must begin withholding the 0.9% Additional Medicare tax from their wages at that point, even though you don’t owe a matching amount.
Third, when you’re making quarterly estimated tax deposits. The IRS requires employers to deposit withheld taxes and employer FICA on either a monthly or semi-weekly schedule, depending on your total tax liability. Getting the estimate wrong can result in penalties for underpayment.
Payroll software or a payroll service handles all of these calculations automatically and generates the deposit amounts and filing forms you need. If you’re running payroll for even a handful of employees, the cost of a payroll service (often $40 to $80 per month plus a few dollars per employee) is usually worth the accuracy and time savings.