What an $84,000 hire costs in employer payroll tax: $6,510, not 30%

Federal employer payroll tax on an $84,000 hire is $6,510 over the first twelve months. That is 7.75% of pay. The common rule of thumb, multiply salary by 1.3, adds $25,200, nearly four times as much.

*Rates are the 2026 figures carried in the hire-affordability tool and verified on 6 September 2026 against IRS Topics 751 and 759 and the Social Security Administration's wage base. Checked again for arithmetic on 30 September 2026.*

The three federal employer taxes

- Social Security: 6.2% of wages, up to $184,500 of wages per person in 2026. - Medicare: 1.45% of wages, no cap. - Federal unemployment tax (FUTA): 0.6% of the first $7,000 of wages per person per calendar year, after the credit most employers receive for paying state unemployment tax.

Sources: IRS Topic 751, IRS Topic 759, SSA contribution and benefit base.

Month by month, on $7,000 of pay

$84,000 a year is $7,000 a month.

- Social Security and Medicare: $7,000 × 7.65% = $535.50. - FUTA: $7,000 × 0.6% = $42, until the first $7,000 of the calendar year is used up. One month does it.

A December start is the case worth seeing. FUTA is $42 in December. The base resets on January 1, so it is $42 again in January.

| Month | Employer tax | |---|---| | December 2026 | $577.50 | | January 2027 | $577.50 | | February 2027 through November 2027 | $535.50 each |

Ten months at $535.50 is $5,355. Add the two $577.50 months, $1,155. Total $6,510.

$6,510 ÷ $84,000 = 7.75%.

Where 1.3 comes from, and what it is covering

A 1.3 multiplier is not a tax figure. It is a bundle: payroll tax, health insurance, paid time off, equipment, sometimes a share of the office. Used as a budgeting shorthand it is fine. Used to answer "can we carry this person," it hides which part is tax and which part is a choice.

On the same $84,000, with a $9,600 a year health contribution:

- Employer tax: $6,510 - Health contribution: $9,600 - Together: $16,110, or 19.2% of pay

The rule says $25,200. The gap, $9,090, is whatever else the owner is counting: equipment, software, training, a slice of rent. Some of that is real. None of it is payroll tax, and none of it is known until the owner lists it.

The same tax at a different salary

The Social Security cap is why the percentage falls as pay rises. At $250,000 for a full calendar year:

- Social Security: $184,500 × 6.2% = $11,439 - Medicare: $250,000 × 1.45% = $3,625 - FUTA: $42 - Total: $15,106, or 6.04% of pay

Higher pay, lower percentage. The multiplier rule gets worse, not better, as salaries go up.

What the arithmetic leaves out

State unemployment tax. Your rate and wage base come from your state's annual rate notice, and they vary widely. Workers' compensation insurance, which is priced by job class. Any local payroll tax. Benefits other than the ones you list. The 0.9% Additional Medicare Tax is withheld from the employee, not paid by the employer, so it is not in these figures.

The FUTA credit assumes state unemployment tax was paid on time. If it was not, the FUTA figure is higher.

Where the tool fits

We built a calculator that runs this month by month and then asks whether the business can carry the cost: unfoldcfo.com/tools/hire-affordability. The two-location dental practice with the $84,000 hygienist is written up in full at unfoldcfo.com/guides/hire-affordability, including the month the hire stops being easy to undo. The tool leaves out state unemployment tax and says so on its face. It does not say whether the role is worth having.

Sources. IRS Topic 751, Social Security and Medicare Withholding Rates; IRS Topic 759, Form 940 Employer's Annual Federal Unemployment (FUTA) Tax Return; Social Security Administration, Contribution and Benefit Base. The dental practice and the $250,000 salary are illustrations, not customers. General information, not tax advice; your CPA owns the judgment calls.