Holding two full-time jobs is a budgeting decision before it is a tax decision: each paycheck looks great in isolation and the two together hit a higher marginal bracket, a second set of FICA wages and — the trap almost nobody models — a single $23,500 employee deferral limit shared by both 401(k) plans. This tool takes both jobs, applies 2026 federal brackets to the combined income, and shows what the second job is actually worth after tax.
All five rows are generated by the same federalTax() and fica() functions the calculator runs — change any input above and the numbers recompute from the same code path. The last column is the figure that matters: what the second salary is really worth after the higher bracket and the extra 1.45% Medicare.
| Scenario | Job 1 | Job 2 | Combined federal tax | Employee FICA | Second-job net | Marginal rate |
|---|---|---|---|---|---|---|
| Single — $120k + $95k | $120,000 | $95,000 | $40,711 | $14,171 | $67,081 | 29.39% |
| Single — $90k + $40k part-time | $90,000 | $40,000 | $20,183 | $9,945 | $27,929 | 30.18% |
| MFJ — $150k + $110k | $150,000 | $110,000 | $40,366 | $15,228 | $81,625 | 25.80% |
| Single — $200k + $150k (Medicare surtax) | $200,000 | $150,000 | $86,412 | $17,343 | $97,046 | 35.30% |
| MFJ — $120k only, no second job | $120,000 | $0 | $10,059 | $9,180 | $0 | 0.00% |
FICA is 6.2% Social Security up to the $176,100 wage base plus 1.45% Medicare on every dollar, and the 0.9% Additional Medicare Tax above $200,000 single / $250,000 MFJ. Only the employee half is shown; your two employers each pay their own 7.65% and never coordinate, so over-withholding on Social Security is common and is claimed back as a credit on Form 1040.
Section 127 of the Internal Revenue Code lets an employer pay up to $5,250 per calendar year of an employee's education expenses — tuition, fees, books, and required equipment — free of federal income tax and free of FICA. The exclusion is per employee, not per job, so two employers cannot each give you $5,250 tax-free: the second employer's payments above your remaining $5,250 room become taxable wages on your W-2.
Treat the second job as a marginal decision, not an average one. The first dollar of job-two pay is taxed at your top bracket — 22%, 24%, or 32% — plus 7.65% FICA plus state tax. Enter both salaries above and read the "second job's real after-tax value" line: that is the number to compare against the hours, the commute, and the risk to both jobs.
On paper a $120,000 job plus a $95,000 job is $215,000 of income. In practice the second salary is taxed at the margin: the 24% federal bracket starts at $103,350 of taxable income for a single filer in 2026 and runs to $197,300, so most of job two lands in 24% — not the 22% that job one's payroll assumed. Stack 7.65% FICA, 1.45% of which is uncapped, and a state rate, and a $95,000 second salary typically nets somewhere near $66,000 rather than the $72,000 the offer letter implies.
That gap is not a reason to skip the job; it is the reason to plan the cash flow. Two payrolls means two withholding streams that each look correct and together are wrong. The most common overemployment surprise is a $6,000–$12,000 balance due in April, plus an underpayment penalty, on income that was fully reported by both employers.
Section 127 is the only broad, permanent employer-education exclusion in the code, and it is the reason a second employer's tuition benefit is not automatically free money. The $5,250 cap is annual and per employee. If Job 1 already reimbursed $5,250 of an MBA, every dollar Job 2 pays for the same or different coursework is taxable wages subject to income tax and FICA.
Written plan requirement: the employer must have a separate written educational assistance program that does not discriminate in favor of highly compensated employees, and the assistance cannot be a substitute for compensation. Cash reimbursements that are really a bonus dressed up as tuition fail the test and are fully taxable. Graduate coursework qualifies, and since the Tax Cuts and Jobs Act the exclusion covers principal and interest on qualified education loans paid by an employer — but only inside the same $5,250 ceiling.
⚠️ Disclaimer: This calculator estimates 2026 federal income tax using the standard deduction and published brackets, plus employee FICA. It ignores state and local tax, itemized deductions, credits other than none, and any employer-specific plan rules. Section 127 treatment depends on your employer having a compliant written plan. It is a planning estimate, not tax advice.