Tax season comes with plenty of deadlines, and missing one can lead to penalties, interest, and unnecessary headaches. If you're filing a Maryland individual income tax return, understanding when to file, when to pay, and how extensions work can help you stay compliant and avoid surprises.
Here's what Maryland taxpayers need to know about filing and paying individual income taxes for the 2026 tax year.
When Is the Maryland Income Tax Return Due?
Maryland generally follows the federal income tax filing calendar. For most taxpayers, 2026 Maryland individual income tax returns are due on the same date as federal returns, April 15, 2027.
If the federal filing deadline falls on a weekend or legal holiday and is moved to the next business day, Maryland generally follows the adjusted deadline.
Filing your return on time helps you avoid late-filing penalties and ensures that any refund you're owed can be processed as quickly as possible.
When Is My Maryland Tax Payment Due?
If you owe Maryland income tax, your payment is generally due by the original filing deadline.
This is true even if you receive an extension of time to file your return. An extension gives you more time to submit your tax forms, but it does not extend the deadline for paying the tax you owe.
If you expect to have a balance due, it's a good idea to estimate your liability and submit payment by the original deadline. Any unpaid balance may be subject to penalties and interest.
Can I Get an Extension to File My Maryland Return?
Yes. Maryland allows taxpayers to request an extension of time to file their individual income tax return.
In many cases, taxpayers who receive a federal extension automatically receive a corresponding Maryland extension. The extension typically provides up to six additional months to file, moving the deadline into October.
However, if you expect to owe Maryland tax, you should generally pay the amount due by the original filing deadline. Filing an extension without paying your tax liability can result in interest and penalties on any unpaid balance.
An extension helps with paperwork; it doesn't postpone your tax bill.
What Happens If I File or Pay Late?
Missing a tax deadline can increase the amount you owe.
Depending on your situation, Maryland may assess:
- A late filing penalty
- A late payment penalty
- Interest on unpaid tax balances
These charges can continue to accrue until your balance is paid in full.
If you're unable to pay the entire amount due, it's generally better to file your return on time and pay as much as possible. Doing so may help reduce penalties and prevent additional filing-related charges.
Do I Need to Make Estimated Tax Payments?
You may need to make estimated tax payments if you earn income that isn't subject to withholding.
This commonly includes:
- Self-employment income
- Freelance or contract work
- Gig economy earnings
- Rental income
- Investment income
- Retirement income with insufficient withholding
Maryland's estimated tax payment due dates generally follow the federal schedule:
- April 15
- June 15
- September 15
- January 15 of the following year
If a due date falls on a weekend or legal holiday, the deadline moves to the next business day.
Making timely estimated tax payments can help you avoid underpayment penalties and reduce the likelihood of owing a large balance when you file.
What Makes Maryland Income Taxes Unique?
Maryland's income tax system includes both a state income tax and a local income tax. Every Maryland county and Baltimore City impose a local income tax rate that is added to the state tax calculation.
The good news is that you don't have to file a separate local tax return. Your local income tax is calculated and reported as part of your Maryland individual income tax return.
Because local tax rates vary by county and city, your tax liability may differ depending on where you live, even if your income is the same as another taxpayer's.
How Can I Pay My Maryland Income Tax?
Maryland offers several payment options for individual taxpayers, including:
- Electronic payments through Maryland's online tax portal
- Direct debit when e-filing
- Credit or debit card payments (processing fees may apply)
- Check or money order payments submitted with the appropriate forms
Electronic payment is often the fastest and most convenient option because you'll receive confirmation that your payment was submitted successfully.