How to Pay Your State Income Tax
Where your state income tax payment goes and how to send it
State income tax payments go to your state's department of revenue (or equivalent agency—the name varies by state). You send money directly to that agency, not to your employer or the IRS. The state uses your payment to fund schools, roads, courts, and other services run at the state level.
Most people never write a check because their employer withholds state tax from each paycheck automatically. But if you're self-employed, have income your employer didn't withhold from, or owe more than what was withheld, you'll need to pay the state directly. The method depends on your state and the amount.
Unlike federal taxes, which have one deadline (April 15), state tax deadlines vary. Most align with the federal deadline, but some differ. Your state's revenue department website lists the exact date for your state.
Key Takeaways
- State income tax payments go to your state revenue department, not the IRS, and the deadline varies by state—check your state's website for the exact date.
- Most people pay through employer withholding, but self-employed people and those with additional income must pay quarterly estimated taxes or a lump sum by the deadline.
- You can pay online through your state's revenue portal, by mail with a check, or by phone or ACH transfer depending on what your state accepts.
- If you miss the deadline, the state charges interest and penalties that grow daily, so contacting your revenue department early if you can't pay is better than ignoring the bill.
How to pay online through your state revenue portal
Every state revenue department has a website where you can pay state income tax directly. Search "[your state] department of revenue" or "[your state] pay taxes online" to find the portal. You'll need your Social Security number or federal employer ID number, your filing status, and the amount you owe.
The online portal usually accepts payment by debit card, credit card, or bank account (ACH transfer). Credit card payments often trigger a processing fee of 1 to 3 percent, charged on top of your tax bill. ACH transfers are usually free or cost a flat fee of a few dollars. The payment posts within one to three business days, though some states offer same-day posting for an extra fee.
Print or save your confirmation number immediately after you pay. This is your proof of payment if the state later claims they never received it. Keep it for at least three years.
Paying by mail with a check or money order
If you prefer not to pay online, you can mail a check or money order to your state revenue department. The address is on your tax bill or on the state's website. Write your Social Security number and tax year on the check itself.
Mail takes five to ten business days to arrive, and the state processes it after it arrives. If your deadline is April 15 and you mail on April 14, the payment will be late. The state considers a payment on time only if it arrives by the deadline, not if you mail it by the deadline. If you're cutting it close, pay online instead.
Keep a copy of the front and back of your check or the money order receipt. If the state says they didn't receive it, you'll need proof you sent it.
Quarterly estimated tax payments if you're self-employed
If you're self-employed or have income without withholding, you usually can't wait until April 15 to pay. Instead, you make four quarterly estimated tax payments throughout the year. Each payment covers roughly one-quarter of your expected annual tax bill.
The quarters end on March 31, June 30, September 30, and December 31. Payments are due one month after each quarter ends (April 15, June 15, September 15, and January 15 of the following year). Your state revenue department website has a worksheet to calculate what you owe each quarter, or you can use last year's state tax bill as a rough guide.
You pay each quarterly estimate through the same online portal, by mail, or by phone as you would a regular state tax payment. If you miss a quarterly deadline, the state charges interest and penalties on that quarter's amount starting immediately.
What happens if you can't pay by the deadline
If you can't pay the full amount by the deadline, pay what you can and contact your state revenue department immediately. Most states allow you to set up a payment plan where you pay the remaining balance in monthly installments. The state charges interest on the unpaid balance, but a payment plan stops the penalty from growing as quickly as it would if you ignored the bill entirely.
To set up a plan, call the phone number on your tax bill or visit your state's revenue website. Have your Social Security number, the amount you owe, and your income information ready. The state will tell you how much your monthly payment must be and when it's due. Payments are usually deducted from your bank account automatically (ACH) each month.
If you don't contact the state and don't pay, they will eventually file a tax lien against you, which damages your credit and makes it harder to borrow money. They can also garnish your wages or seize your bank account. Acting early—even if you can only pay part of what you owe—prevents this.
Late payment penalties and interest
If your payment arrives after the deadline, the state charges two separate costs: interest and penalties. Interest is a percentage of what you owe, set by the state and recalculated daily. Penalties are usually a flat percentage of your unpaid tax, charged once, though some states add additional penalties if you're very late.
The exact rates vary by state. Interest might be 5 to 8 percent per year, and penalties might be 5 to 25 percent of the unpaid tax, depending on how late you are. A state's revenue website lists the current rates. The longer you wait to pay, the more interest accumulates.
If you file your state tax return late (after the deadline) but pay on time, you usually avoid penalties but still owe interest on any tax you paid late during the year. If you file late and pay late, both penalties and interest apply.
Paying state taxes if you moved to a different state
If you moved during the year, you may owe taxes to both your old state and your new state. Most states tax you based on where you lived when you earned the income. If you lived in State A for six months and State B for six months, you owe State A tax on income earned while you lived there and State B tax on income earned while you lived there.
When you file your federal return, you'll file separate state returns for each state where you lived and worked. Each state's return goes to that state's revenue department, and you pay each state separately. Some states offer a credit for taxes paid to another state to prevent double taxation, but you have to claim it on your return.
If you're unsure which states you owe, contact both states' revenue departments or speak with a tax preparer. Paying the wrong state or missing a state entirely can result in bills and penalties from the state you didn't pay.
Frequently Asked Questions
Can I pay my state income tax with a credit card?
Yes, most states accept credit cards through their online payment portal, but the payment processor charges a fee of 1 to 3 percent on top of your tax bill. This fee is not tax-deductible. If you're paying a large amount, the fee can be significant—paying $5,000 with a 2 percent fee costs you an extra $100. ACH transfer (direct from your bank account) is usually free or much cheaper.
What if I can't pay by April 15?
Call your state revenue department or visit their website to request a payment plan. You can usually pay in monthly installments, though interest continues to accrue on the unpaid balance. Acting before the deadline is better than waiting—the state will work with you if you reach out early, but ignoring the bill results in liens and wage garnishment.
Do I have to pay state income tax if I don't owe federal tax?
Not necessarily. State tax rules differ from federal rules. Some states have lower income thresholds, meaning you owe state tax even if you don't owe federal tax. Check your state's revenue website or use their tax calculator to see if you owe. If you're unsure, file a return anyway—it's better to file and owe nothing than to skip filing and face penalties.
Can the state take my refund if I owe back taxes?
Yes. If you owe state income tax from a prior year and you're due a refund this year, the state can keep your refund to pay down what you owe. This is called "offset" or "intercept." The state will notify you before they do this. If you owe to multiple agencies (state tax, child support, student loans), your refund may be split among them.
What's the difference between state and federal tax deadlines?
Most states use the same April 15 deadline as the federal government, but a few differ. Some states follow the federal deadline automatically—if the IRS gives you an extension, the state extension applies too. Check your state's revenue website for the exact deadline in your state, as it can change year to year.