Privacy update — October 11, 2026: ordinary calculator input no longer changes the address. Sharing starts with a page link without inputs; including salary and conditions requires an explicit, off-by-default choice and a preview. This update does not recheck tax law, change calculations or erase requests and logs from older links.
Two people can each have an $80,000 offer and still see different deposits. But a comparison is only useful when you say which inputs changed. This guide holds most factors fixed, then changes the modeled filing status or an assumed effective state rate one at a time. It is a controlled illustration, not a claim about anyone’s real pay stub.
Fix the assumptions before reading the numbers
Every example below uses one $80,000 wage in 2026, the standard deduction, no other income, no spouse wages, no tax credits or itemized deductions, no voluntary 401(k) or HSA deposits, no insurance premiums, no local taxes, and no extra W-4 withholding. The app computes annual federal income tax under the 2026 brackets, regular FICA on that wage, and the state percentage supplied by the user on gross salary. It divides annual net by 12.
Your actual paycheck uses your employer’s payroll schedule and IRS withholding rules, as well as benefits and W-4 choices this app cannot accept. A modeled monthly average is therefore not a deposit forecast or a tax-return calculation.
Comparison 1: filing status, with one wage only
The IRS 2026 standard deduction is $16,100 for a single filer and $32,200 for a married couple filing jointly. The federal brackets also differ. Compare an eligible single filer earning $80,000 with an eligible joint-return household whose only wage is $80,000; keep the state-rate input at 0% for both.
The model computes $8,770 annual federal tax in the single scenario and $5,240 in the joint-return scenario. After the same $6,120 regular employee FICA, annual modeled net is $65,110 versus $68,640—a $3,530 difference within these narrow assumptions. Dividing by 12 gives $5,425.83 and $5,720.00. That does not mean getting married or changing a form will automatically add $3,530 to a paycheck. A working spouse, other income, credits, deductions, or W-4 adjustments can substantially change the result; filing status itself is subject to eligibility rules.
Comparison 2: a hypothetical 5% state input
Keep the single-filer scenario and change just the tool’s state input from 0% to 5%. The app multiplies $80,000 gross salary by 5% and subtracts $4,000 for the year. Its modeled net falls from $65,110 to $61,110, or from $5,425.83 to $5,092.50 a month. The monthly difference is $333.33.
This does not mean any specific state’s tax on $80,000 is exactly 5%. State brackets, deductions, credits, reciprocity, and local taxes are not modeled. A top state bracket is not the effective rate to enter. Check the relevant state tax agency before using this comparison for a move or offer.
What stayed the same: regular FICA wages
For each $80,000 example here, we deliberately hold covered Social Security and Medicare wages equal and assume no benefits that change those wage bases. Regular employee FICA then stays $4,960 Social Security plus $1,160 Medicare for the year, regardless of which federal filing-status model or state-rate input we select. SSA lists the 2026 Social Security wage base at $184,500; Medicare has no matching cap.
Equal gross salary alone does not always mean equal FICA withholding. Some qualifying benefit elections change taxable wage bases, and high wages have separate Social Security and Additional Medicare thresholds. The IRS 2026 employer guide explains these payroll distinctions.
| $80,000 annual-model scenario | Federal tax/yr | Assumed state tax/yr | Net/yr | Net ÷ 12 |
|---|---|---|---|---|
| Single, 0% state input | $8,770 | $0 | $65,110 | $5,425.83 |
| Joint return, 0% state input; no spouse wage | $5,240 | $0 | $68,640 | $5,720.00 |
| Single, 5% state input on gross | $8,770 | $4,000 | $61,110 | $5,092.50 |
The gap between the first and last rows is exactly $4,000 because only the state-rate assumption changed. The gap between the middle and first rows is $3,530 in modeled federal tax, not a general married-filer benefit. Each row assumes the same $6,120 regular employee FICA.
Benefits can reverse a superficial comparison
Two workers on the same gross salary can also elect different benefits. A traditional 401(k) deferral generally lowers current federal taxable income but remains subject to Social Security and Medicare tax. A qualifying HSA salary reduction through a Section 125 cafeteria plan can have different payroll-tax treatment; an ordinary employee HSA payroll deduction is not automatically excluded. See the IRS 401(k) guide and IRS 2026 employer guide.
The calculator has no fields for those elections, health premiums, W-4 details, or a spouse’s wages. It cannot tell you which worker will actually receive more cash on payday. A smaller deposit can reflect money saved into the worker’s account rather than a higher tax bill.
It also omits credits, itemized deductions, other earnings, some additional taxes, and local taxes. These omissions can move a real result in either direction. Treat the examples as a way to isolate variables, not as an upper or lower bound on net pay.
Use the calculator—and keep the URL in mind
Enter a salary, eligible filing status, and assumed effective state rate on gross in the US paycheck calculator. The output is a simplified 2026 annual federal-tax/FICA/state-rate model divided by 12—not a W-4 withholding estimate for a specific pay period. For personal withholding decisions, use the IRS Tax Withholding Estimator with real pay stubs.
The calculator runs its math in your browser; ordinary input is not written into the address. Use Sharing options for a page link without inputs, or explicitly select input inclusion (off by default) to preview a scenario link. Review the URL before copying it: opening its query string sends those values in a request that may appear in hosting logs. Clearing an older salary URL from the address bar does not erase its initial request, past links, history or logs. The site’s privacy policy describes this risk.
One more controlled offer comparison
Using the same single-filer, no-benefits assumptions as above, the model places an $82,000 offer with a 5% entered state rate at $62,417 annual net. An $80,000 offer with a 0% entered state rate comes to $65,110—$2,693 more in this model despite the lower gross salary. That $2,693 result is not a prediction about two real states, jobs, or pay stubs.
Use net-pay scenarios as one lens, then compare employer 401(k) match, insurance premiums, commute, bonus terms, and living costs. For a tour of what each pay-stub line actually means, read Why your paycheck is smaller than your salary. If an offer changes gross salary, the percentage calculator can show its percentage increase separately from take-home pay.