Contractor Paycheck Calculator: Rebuilding the Pay Stub Nobody Sends You
An employee's paycheck arrives already trimmed. A contractor's payment arrives whole, which feels better for about six weeks and then stops feeling good at all. The full amount is not yours: some of it belongs to the IRS, some to your state, and some to the running costs of the work itself. A contractor paycheck calculator does what a payroll department would have done — separates the three before you spend the fourth.
What an employer was quietly doing for you
On a W-2, your employer withheld federal income tax, 6.2% Social Security, 1.45% Medicare, and state tax, then paid a matching 7.65% out of their own pocket. As a contractor, all of that is yours: the full 15.3% self-employment tax and every dollar of income tax, unwithheld. That is why a $70,000 contract is not equivalent to a $70,000 salary and why parity usually sits somewhere between 1.25x and 1.4x the salary figure.
The three-way split of every payment
Each payment divides into cash business costs, tax to hold back, and genuine take-home. The mistake is treating the first two as optional and the third as the whole payment. Move the tax portion to a separate account the day the money lands and the problem stops existing.
How the hold-back is calculated
Start with gross pay for the period, subtract cash business expenses to get profit, then apply self-employment tax at 15.3% of 92.35% of profit, federal income tax at your effective rate after the standard deduction, and your state rate.
Self-employment tax
The predictable part. Roughly 14.1% of profit in effective terms, and it applies even when income tax does not.
Federal income tax
Progressive, so the effective rate is well below the bracket most people quote. On $50,000 of profit it commonly lands near 9% to 11% effective.
State income tax
Zero in Texas, Florida, Tennessee, Washington, Nevada, South Dakota, Wyoming, and Alaska. Elsewhere, add 3% to 10%.
Worked example: $6,000 a month on contract
A developer contracting at $6,000 monthly grosses $72,000. With $6,000 of annual expenses — software, insurance, a home office, some travel — profit is $66,000. Self-employment tax is about $9,325. After the deduction for half of it and the single standard deduction, federal income tax runs near $6,900, and a 5% state adds about $3,300. Total near $19,525, which is $1,627 per month held back and roughly $4,373 of real monthly take-home before the $500 of cash costs.
Mileage is tax relief, not cash relief
The 2026 standard mileage rate of $0.70 rolls fuel, insurance, maintenance, and depreciation into one number. It lowers taxable profit today while the underlying cost drains out slowly as repairs and lost resale value. A good paycheck calculator therefore subtracts mileage from the tax math and leaves it out of the cash math — otherwise it flatters your take-home by exactly the amount your car is quietly losing.
Setting your contract rate from the take-home you need
Work backwards. If you need $5,000 a month in your pocket, assume a 28% effective tax load and add your business costs: $5,000 divided by 0.72 is roughly $6,950, plus costs, so bill around $7,500 a month. Contractors who set rates from a salary comparison rather than a take-home target almost always underprice by the exact size of the self-employment tax.
Where the held-back money should live
A separate high-yield savings account, funded by a standing transfer the day each payment clears, drawn down four times a year on the 1040-ES deadlines. The mechanical part matters more than the arithmetic: contractors who keep tax money in their checking account spend it, no matter how accurate their calculator was.
Build your stub
Enter your pay, frequency, mileage, and expenses in the contractor paycheck calculator to see the hold-back per payment, then use the quarterly tax payment calculator to schedule when it leaves.
Frequently asked questions
+How do I calculate contractor take-home pay?
Subtract cash business costs from gross pay, then hold back self-employment tax on 92.35% of profit at 15.3% plus federal and state income tax. What remains is take-home.
+How much should a 1099 contractor set aside?
Usually 25% to 30% of profit — less for high-mileage work in a no-tax state, more for high-margin consulting in a high-tax state.
+How much more should a contractor charge than a salary?
About 1.25x to 1.4x the equivalent salary to cover self-employment tax, benefits, unpaid time off, and business costs.
+Do contractors get pay stubs?
No. There is no withholding and no stub, which is why contractors build one with a paycheck calculator.
+Can a client withhold tax for me?
Not for ordinary 1099 work. Backup withholding only applies in specific cases such as a missing or incorrect taxpayer ID.
+When do contractors pay the tax they hold back?
Quarterly, via Form 1040-ES — April 15, June 15, September 15, and January 15 for the 2026 tax year.
About the author
Javed Niamat · Founder & Editor, GigTax
Javed Niamat founded GigTax to make self-employment tax math understandable for rideshare drivers, delivery couriers, creators and freelancers. He builds and maintains every calculator on this site and writes the guides that explain the numbers behind them.
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