Federal and state guide
Federal vs. State Tax Refunds: Why the Amounts Are Different
A federal refund and a state refund come from different tax systems. Each compares its own payments with its own liability, so one return can show a refund while the other shows an amount due.
9 min read · Educational guidance
Key takeaway: Never combine federal and state withholding before calculating the two results separately; use a combined number only as a final cash-flow summary.
Two agencies, two calculations
The IRS calculates federal income tax under federal law. A state revenue department applies its own brackets, deductions, exemptions and credits. Refunds are therefore processed and paid separately.
The ToolsFA combined result is a planning convenience. Review the federal and state lines before relying on the total.
Example: A $1,200 federal refund and a $400 state balance due produce an estimated combined cash result of $800, but the payments will not be issued or collected together.
Related: Estimate a refund from your W-2 →
Enter payments in the matching calculator fields
Choose the federal filing status and one resident state for the scenario. Enter W-2 Box 1 wages and any supported other income once. Federal tax already paid combines federal income-tax withholding, such as W-2 Box 2, with confirmed federal estimated payments for the same tax year. The selected state's tax-already-paid field combines its withholding, such as W-2 Box 17, with confirmed estimated payments to that state.
Do not put a combined payslip deduction total into either field: it can include Social Security, Medicare, insurance and retirement contributions. Keep payment confirmations by agency and tax year, and do not add a full-year slip total to year-to-date payslips covering the same withholding.
The tool estimates federal income tax, modeled self-employment tax and a simplified resident-state tax using a representative rate and deduction. It does not prepare returns, track refund status, reconcile agency accounts, calculate local taxes or handle every credit, special tax rate, multi-state allocation, penalty, interest or refund offset. Use the salary tool separately for regular paycheck planning.
- ✓ Select filing status and one resident state
- ✓ Enter supported annual income without duplicating it
- ✓ Total confirmed federal withholding and federal estimated payments
- ✓ Total only the selected state's withholding and estimated payments
- ✓ Press Calculate estimate and read both jurisdiction balances before the combined total
Example: Assume federal withholding is $8,000 and confirmed federal estimated payments are $1,000: enter $9,000 as federal tax already paid. If selected-state withholding is $2,500 and state estimated payments are $300, enter $2,800 in that state's field—not $11,800 in either field. If assumed federal liability is $7,800 and state liability is $3,200, the separate results are a $1,200 federal refund and $400 state amount owing, or $800 combined. These liabilities are illustrative arithmetic, not a tax calculation for a stated salary.
A combined refund is not a payment instruction
An estimated net refund does not automatically pay a current state bill from a federal refund, or the reverse. Check each agency's filing result, payment deadline and refund status separately. Do not assume the federal refund will arrive before a state payment is due.
Debt collection is a separate issue. The IRS describes refund-offset and levy programs that can affect refunds for qualifying overdue debts. A quick estimate does not know whether an offset applies; read any agency notice rather than treating the combined calculator figure as the amount that must reach your bank account.
Related: 2026 Child Tax Credit →
States without a broad wage-income tax
Several states do not impose a broad individual income tax on wages. That does not remove federal income tax, FICA, sales tax, property tax or every state-level tax.
Washington has a separate capital-gains tax that is outside this wage-income calculator. New Hampshire does not tax wage income.
- ✓ Alaska
- ✓ Florida
- ✓ Nevada
- ✓ New Hampshire
- ✓ South Dakota
- ✓ Tennessee
- ✓ Texas
- ✓ Washington
- ✓ Wyoming
When a one-state estimate is not enough
Part-year moves, remote work across state lines, nonresident returns and city taxes can materially change the outcome. New York City, Yonkers and many Pennsylvania and Ohio localities are common examples.
Use the calculator as an initial resident-state estimate, then check the relevant state revenue agency for filing and allocation rules. Do not combine withholding paid to different states into the selected state's field. Running two scenarios is not a substitute for a part-year or nonresident return or a credit for tax paid to another state; the tool does not calculate those interactions.
Frequently asked questions
Will my federal refund automatically pay my current state balance?
No. The combined result is a cash-flow summary, not an instruction transferring money between agencies. Review and pay each current filing balance separately. Government debt-offset and levy programs are distinct and can affect the eventual refund.
Why is my state refund $0 in the calculator?
A selected state may not impose a broad tax on wage income, or entered state withholding may equal the simplified estimate.
Are city income taxes included?
No. Local income taxes are excluded and can materially change the final result.
Where do federal and state estimated payments go?
Add confirmed federal payments to federal tax already paid, and confirmed payments to the selected state to its own tax-already-paid field. Match the tax year and do not count a payment twice.
Can I combine withholding from two states?
Not in the one-state field. Keep records separated by state and obtain the appropriate part-year or nonresident calculation. The tool does not calculate state allocation or credits for tax paid to another state.
Official sources and important note
- IRS federal income-tax rates and brackets
- Federation of Tax Administrators directory
- IRS: how withholding and estimated payments affect an estimated refund
- IRS: federal and state levy programs
- IRS: federal refund splitting and offsets
General educational information only, not personal tax advice. Confirm your position with the IRS, your state tax agency or a qualified tax professional.