Estimate Massachusetts take-home pay and employer payroll cost with federal withholding, FICA, the 2026 Circular M percentage method, Form M-4 exemptions, Massachusetts PFML, unemployment insurance, Workforce Training Fund, EMAC, FUTA, optional workers compensation, and employer burden assumptions.
| Tax or contribution | Who pays | 2026 rule used | Calculator treatment |
|---|---|---|---|
| Federal income tax | Employee withholding | IRS Publication 15-T automated percentage method. | Annualizes taxable wages, applies W-4 status, Step 2, Step 3, Step 4(a), Step 4(b), and Step 4(c). Optional bonus mode uses the federal supplemental flat rate. |
| Massachusetts income tax withholding | Employee withholding | Circular M uses a 5.0% withholding rate, pay-period exemption amounts from Form M-4, a $2,000 annual cap for Social Security, Medicare, and eligible retirement contributions, and a 4% surtax above the 2026 annualized threshold. | Subtracts the capped Circular M deduction, subtracts the applicable M-4 exemption amount, applies 5.0% and optional surtax withholding, applies head-of-household and blindness reductions, and adds extra withholding. |
| Resident, nonresident, and allocation setup | Employee withholding setup | Massachusetts DOR guidance covers residents' wages, nonresidents' wages for Massachusetts services, and credit-style treatment when a non-Massachusetts employer withholds for its home state. | Lets the user allocate wages to Massachusetts, subtract a user-entered other-state withholding credit, or turn off Massachusetts withholding for no-withholding scenarios. |
| Massachusetts unemployment insurance | Employer | DUA lists 2026 new-employer rates of 2.42% for non-construction employers and 6.08% for new construction employers. The UI wage base is modeled at $15,000 per employee. | Uses YTD wages before this check for the wage-base cap and applies editable UI, Workforce Training Fund, COVID recovery assessment, and EMAC rates to allocated Massachusetts gross wages. |
| Massachusetts PFML | Employee and sometimes employer | PFML contributions are capped by the Social Security taxable maximum. For 25+ covered individuals, total contribution is 0.88% of eligible wages; employee withholding can reach 0.46% and employer share is 0.42%. | Uses YTD wages before this check for the Social Security wage-base cap, deducts the employee PFML share from net pay, and adds employer PFML for large-employer scenarios. |
| Workers comp and other employer load | Employer | Massachusetts generally requires employers to carry workers compensation coverage; rates vary by carrier, classification, payroll, and experience. | Uses optional employer-entered percentages so the payroll tax result can include estimated workers comp, benefits, or other employer burden. |
This calculator is a planning estimate, not payroll tax, legal, or accounting advice. Real payroll can differ because of Form M-4 setup, exempt status, nonresident work allocation, another state's withholding, employer-specific DUA rate notices, COVID recovery assessment rates, EMAC status, PFML private-plan exemptions, pre-tax deduction treatment, taxable fringe benefits, workers compensation classifications, and supplemental wage handling.
Primary references: IRS Publication 15-T, IRS Publication 15, Massachusetts DOR withholding tax forms and Circular M, Massachusetts withholding taxes on wages, Massachusetts PFML contribution rates, Massachusetts DUA employer contributions, Massachusetts Employer's Guide to Unemployment Insurance, Massachusetts EMAC guidance, and Massachusetts workers compensation insurance requirements.
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