Why is the multiple usually between 1.25 and 1.4?

Payroll tax alone is about 7.65% of salary up to the wage base. Benefits commonly add ten to twenty-five percent, and fixed per-head costs add the rest.

Salary & HRpayroll

Employer Payroll Cost Calculator

What an employee actually costs, which is well above the salary. Payroll tax, benefits and fixed per-head costs typically add a quarter to a third on top.

Also called: cost of an employee, true cost of hiring.

True cost of the employee

$117,650.00

$117,650.00 a year to employ someone on 100,000. That is 1.18x salary: $7,650.00 of payroll tax, $10,000.00 of benefits and $0.00 of fixed costs on top.

Employer's Social Security and Medicare

$7,650.00

Benefits

$10,000.00

Fixed costs

$0.00

Cost as a multiple of salary

1.18

Per month

$9,804.17

Per working hour

$56.56

How this is calculated

Computed from the published rates for the tax year you selected, which is not necessarily the current year. A calculation, not tax advice, and it does not know anything about your circumstances beyond the figures entered.

Method and background

This is what the calculation gives for the numbers you entered. It is an estimate, not advice, and it knows nothing about your situation beyond those numbers. Rules for United States change on a published schedule; the effective date is shown on every rule-based tool.

How this is calculated

The employer matches Social Security and the base Medicare rate but not the additional Medicare levy. On top of that sit benefits and the fixed cost of having a person at all: equipment, space, software seats and insurance. The multiple of salary is the number worth remembering, and it is why a contractor rate that looks expensive next to a salary often is not.

cost = salary + employer FICA + benefits + fixed costs

S: Gross salary (currency)
FICA_e: Employer's payroll tax (currency)
b: Benefits as a share of salary (decimal)
F: Fixed costs per employee (currency)

Worked examples

Each of these is asserted on every build. If a change to the engine ever moved one of these answers, the build would fail before the page could print it.

100,000 salary with 10% benefits

Gross annual salary: $100,000.00
Benefits as a share of salary: 10%
Fixed costs per employee (equipment, space, software): $0.00
Tax year: Tax year 2025

True cost of the employee$117,650.00

Worked by hand: 7.65% employer FICA plus 10% benefits

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above the wage base the employer share flattens

Gross annual salary: $300,000.00
Benefits as a share of salary: 10%
Fixed costs per employee (equipment, space, software): $0.00
Tax year: Tax year 2025

True cost of the employee$345,268.20

176,100 * 6.2% + 300,000 * 1.45%; the employer never pays the additional Medicare levy

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no salary is no cost

Gross annual salary: $0.00
Benefits as a share of salary: 10%
Fixed costs per employee (equipment, space, software): $0.00
Tax year: Tax year 2025

True cost of the employee$0.00

degenerate case

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Method and limits

What it assumes

Benefits are entered as a share of salary, which is how they are usually budgeted.

What it deliberately does not model

Unemployment insurance, workers compensation and state-level employer levies vary widely and are not included.
Recruitment cost and the cost of an unfilled seat are one-off rather than annual and are outside this.

Sources

IRS Publication 15, Employer Tax Guide (primary government)
SSA. Contribution and Benefit Base (primary government)

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Frequently asked questions

Why is the multiple usually between 1.25 and 1.4?: Payroll tax alone is about 7.65% of salary up to the wage base. Benefits commonly add ten to twenty-five percent, and fixed per-head costs add the rest.