Your total tax paid (withholding plus any additional payments) set against your final tax liability, and the difference. A positive difference is a refund; a negative one is a balance due. These figures come from what you entered and are not the tax authority’s official assessment.
Item
Amount
Tax withheld
12,000
Additional payments
0
Total tax paid
12,000
◀ what you paid
Total tax owed (liability)
9,500
◀ what you owed
Refund (+) or amount due (−)
2,500
◀ refund
Estimates only — not financial, tax, or professional advice.
100% private — every number you enter is calculated in your browser and never sent to our servers.
What it calculates: Refund (+) or amount due (−), Refund or due (1 = refund, 0 = due), Total tax paid, Total tax owed.
Updated 5 June 2026 · Transparent assumptions
Over-withholding is an interest-free loan to the tax authority
Withholding of $12,000 against $9,500 actually owed produces a $2,500 refund. Nothing was earned and nothing was granted — $2,500 too much was taken through the year and is now being returned, roughly twelve months after the first instalment of it was taken.
Most people treat a large refund as a windfall, and behaviourally it functions as forced saving, which for some households is genuinely useful. Financially it is an interest-free loan. At a 4% savings rate, $2,500 held through the year rather than surrendered is worth about $50 — small, but it is the correct way to think about the choice.
Adjust the allowances, then check again mid-year
Withholding is set by what you declared to your employer, and it persists until changed. A consistent refund of several thousand means the declaration no longer matches your circumstances — usually because of a marriage, a second job ending, a child, or deductions the declaration does not know about.
The correction is to update the withholding declaration and then verify part-way through the year that the running total is on track. Overshooting in the other direction has a cost: most systems charge a penalty for substantial underpayment, so the target is a small refund or a small balance, not zero.
Income without withholding is the usual cause
A balance owed generally means income arrived with no tax deducted: freelance work, investment income, capital gains, or a second job whose withholding assumed it was the only one. Each is taxed, and none is withheld at the rate your total income implies.
Two defences. Estimated quarterly payments cover the gap as it arises, which most systems require above a threshold. Or extra withholding can be requested from an employer, which spreads the same amount across the year and, in several systems, is treated as paid evenly regardless of when it was actually deducted — useful for catching up late in the year without a penalty.
A tax figure you have already computed
This page compares two numbers; it does not compute the tax owed. That figure has to come from a full calculation — bands, deductions, credits and every charge that applies — and any error there flows straight through to the refund or balance shown.
Refundable credits complicate it further: in some systems they can produce a refund exceeding everything withheld, which this simple comparison would not anticipate. Timing also matters, since a refund is not immediate and processing can take weeks or months. Treat the figure as the year\u2019s position, not as money available now.
Sources & References
Figures on this page are checked against primary, authoritative sources. Links open in a new tab.
Tax rules vary by country, state, tax year, filing status, income type, deductions, and exemptions. This calculator is educational and uses the values you enter. Always verify final tax treatment with official sources or a qualified tax professional.
Published the calculator with its formula, worked example, assumptions, limitations and a bespoke guide, and added an automated formula test suite covering it.
Tested that the result flips sign correctly around the break-even point, so a balance owed is reported as owed rather than as a negative refund.
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