How to pay Wisconsin estimated taxes.

Wisconsin collects its own estimated tax through the Wisconsin Department of Revenue, separate from the IRS. Here’s who needs to pay, when, and how to pay online.

Do you need to pay?

You must pay estimated tax if you expect to owe at least $500 in Wisconsin tax for 2026 after withholding and credits, and your withholding will be less than the smallest of 90% of your 2026 tax, 100% of your 2025 tax, or 90% of your annualized 2026 tax.

Generally no underpayment interest if you prepay at least the smaller of 90% of your 2026 tax or 100% of your 2025 tax (prior year must be a 12-month return). Full-year residents with no tax liability for 2025 owe no estimates. No higher prior-year percentage for high-income individuals is stated.

If you underpay: 12% per year on underpayments of estimated tax, computed on Schedule U.

For how to pick a safe amount, see how much to pay in estimated taxes.

Deadlines

Four equal installments due April 15, June 15, and September 15, 2026, and January 15, 2027. This matches the federal schedule. Filing your 2026 return and paying in full by January 31, 2027 counts as the January payment if you did not owe earlier installments.

Payment	Due
1st	April 15
2nd	June 15
3rd	September 15
4th	January 15 of the next year

A date on a weekend or holiday moves to the next business day. Pay at least two business days early.

Paying Wisconsin, step by step

What you need

Nothing to set up. My Tax Account Quick Pay takes payments without an account.
Your Social Security number and a copy of last year's Wisconsin return.
Your bank routing and account numbers.

Start at My Tax Account Quick Pay, Wisconsin's official payment site.

Go to Quick Pay at tap.revenue.wi.gov/pay. No account is needed.
Select individual income tax and the estimated payment option for tax year 2026.
Enter your identifying information and the payment amount.
Pay from your checking or savings account (free), or choose card, Apple Pay, or PayPal to be redirected to the third-party processor.
Submit and save the confirmation. To schedule or cancel future payments, register for My Tax Account.

Other ways to pay: Card, Apple Pay, and PayPal payments carry a $1 transaction fee plus a 2.25% processing fee. You can also mail a check or money order payable to the Wisconsin Department of Revenue with Form 1-ES (use the interactive voucher on revenue.wi.gov or call 608-266-1961 for personalized vouchers). Check your payments with the Estimated Payment Lookup tool.

Wisconsin will not fill these payments in for you. Your preparer has to enter each estimated payment on your Wisconsin return. Keep your own record of the date, amount, and confirmation number.

Extension payments

A federal extension automatically extends your Wisconsin due date; attach a copy of the federal extension form when you file. There is no separate Wisconsin form. It does not extend the time to pay: unpaid tax accrues interest of 1% per month during the extension. To avoid that, pay the estimated balance by the original due date using a Form 1-ES for the return's tax year (not Form PV), even if you will e-file.

Make this year's first estimated payment as a separate transaction, marked as an estimate for the current year.

Good to know

Extension payments are made on Form 1-ES for the tax year of the return, not on a separate extension voucher.
Farmers and fishers with two-thirds of gross income from those activities can pay all estimated tax by January 15 or file and pay by March 1.
Interest is computed separately for each installment, so a later catch-up payment does not erase interest on an earlier shortfall.
K-1 pass-through withholding goes on the withholding line of your return, not the estimated tax line.
Moved this year? You may owe estimates to both Wisconsin and your other state for the part of the year you lived or earned income in each.
Paying the IRS too? Follow the federal walkthrough. Other states each have a guide of their own.

Official sources

Checked October 2026 against the Wisconsin Department of Revenue's own publications.

This guide is for general education and reflects rules as of October 2026. Tax law and agency websites change, and your situation may have details that change the answer. Please talk with your tax professional before acting on it.