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State Refund Calculator

The State Refund Calculator compares total state payments and refundable credits with final state tax liability. It reports either an estimated refund or an amount due and shows the payment coverage ratio for a quick check of how fully the liability has been prepaid.

The accuracy of the result depends on entering a finalized or well-supported liability estimate and all relevant payments only once. The calculator does not determine eligibility for credits, penalties, interest, or offsets that a state may apply.

Enter your assumptions

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Result
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Estimated state refund
Total payments and refundable credits—
State tax liability—
Payment coverage ratio—

1. Enter final state liability
Use the best available estimate after deductions and credits that are already part of the liability.

2. Add state withholding
Enter withholding from all state wage and income statements.

3. Include estimated payments
Add timely payments made directly to the state for the same tax year.

4. Enter refundable credits
Include only credits not already netted into the liability figure.

5. Check the payment total
Review the refund or amount due and verify that no payment was counted twice.

Total paid = State withholding + Estimated payments + Refundable credits
Refund or amount due = Total paid − Final state tax liability

What the result means

A result at or above zero is an estimated refund. When total paid is below liability, the page changes the label and displays the shortfall as an amount due.

Actual refunds may be reduced by penalties, interest, prior debts, amended figures, or state-specific offsets.

Given: $3,600 of final state tax, $3,900 withheld, $500 of estimated payments, and $250 of refundable credits.

Calculation: Total paid = $3,900 + $500 + $250 = $4,650. Refund = $4,650 − $3,600 = $1,050.

Result: Estimated state refund is $1,050.

Interpretation: Payments and refundable credits equal 129.17% of the estimated liability.

Why did the result change to amount due?

The label changes when total payments and refundable credits are less than the entered tax liability.

Should nonrefundable credits be entered here?

Usually they should already be reflected in final state tax liability. Entering them again would double count the benefit.

Can I include a prior-year overpayment applied forward?

Yes, if the state treats it as a payment for the current year and it is not included elsewhere.

Does a large refund mean my tax was lower?

Not necessarily. A refund primarily means payments exceeded final liability; it may reflect overwithholding rather than lower tax.

Are penalties and interest included?

No. Add them to the liability externally if you need the balance to reflect those amounts.