Filing your North Carolina state income tax return for 2021 is essential in meeting your state tax obligations and avoiding unnecessary penalties. Whether you are a full-year resident, a part-year resident, or a nonresident who earned income in North Carolina, knowing the correct forms, deadlines, and procedures is essential. This guide will walk you through each process stage so you can file accurately and on time.

For the 2021 tax year, the North Carolina Department of Revenue set the filing deadline for April 15, 2022. However, due to COVID-19, the state extended this deadline to May 17, 2022. This extension applies to filing and payment requirements, giving taxpayers additional preparation time. Even though the deadline has passed, understanding the rules for 2021 filings is essential for late submissions, amended returns, and future tax preparation.

The following sections explain the income tax rate, standard deductions, available exemptions, and the forms required to file. You will also learn how to report your income, apply for deductions or credits, submit your return, and make payments if needed. By following this step-by-step approach, you can ensure your return is complete, compliant, and filed with confidence.

Understanding North Carolina’s 2021 State Income Tax

North Carolina has a flat income tax rate of 5.25% for all taxpayers in 2021, no matter how much money they make. This means that no matter if you live in the state full-time or part-time, every dollar of taxable income is taxed at the same rate. After considering the standard deduction or itemized deductions and any applicable exemptions, your taxable income is calculated.

Standard Deduction Amounts for 2021

The North Carolina Department of Revenue provides the following standard deduction amounts for the 2021 tax year. Taxpayers may claim whichever is higher—the standard deduction or their total itemized deductions:

  • Single: $10,750
  • Married Filing Jointly: $21,500
  • Married Filing Separately: $10,750
  • Head of Household: $16,125
  • Qualifying Widow(er): $21,500

Income Thresholds for Filing

You must file a North Carolina income tax return if your gross income is at least:

  • $10,750 for single filers
  • $21,500 for married filing jointly
  • $10,750 for married filing separately (if your spouse does not itemize)
  • $0 for married filing separately (if your spouse itemizes)
  • $16,125 for head of household
  • $21,500 for qualifying widow(er)
  • $0 for nonresident aliens

In addition to income tax, North Carolina collects other taxes, such as property taxes, estate tax (in certain cases), and excise taxes, such as the retail price per gallon for alcoholic beverages, including beer. While these taxes are separate from the annual income tax filing process, understanding the broader state and local tax structure helps taxpayers plan and manage overall revenue obligations.

Income Thresholds for Filing

You must file a North Carolina income tax return if your gross income is at least:

  • $10,750 for single filers
  • $21,500 for married filing jointly
  • $10,750 for married filing separately (if your spouse does not itemize)
  • $0 for married filing separately (if your spouse itemizes)
  • $16,125 for head of household
  • $21,500 for qualifying widow(er)
  • $0 for nonresident aliens

In addition to income tax, North Carolina collects other taxes, such as property taxes, estate tax (in certain cases), and excise taxes, such as the retail price per gallon for alcoholic beverages, including beer. While these taxes are separate from the annual income tax filing process, understanding the broader state and local tax structure helps taxpayers plan and manage overall revenue obligations.

Key Changes for the 2021 Tax Year

Significant changes to the North Carolina tax year 2021 changed how people prepared and filed their returns. If you know about these changes, you can use the correct forms, claim all the exemptions, and avoid making mistakes on your taxes.

COVID-19 Filing Deadline Extension

Due to the pandemic, the North Carolina Department of Revenue extended the filing deadline from April 15, 2022, to May 17, 2022. This change gave individuals and small businesses extra time to complete their federal tax return and gather necessary documents for their state filing. The extension applies to both filing and payment deadlines.

Military Retirement Benefits Deduction

In 2021, qualifying taxpayers could deduct military retirement pay from their North Carolina taxable income. This change reduced the taxable amount for eligible veterans and military retirees, providing meaningful savings.

Decoupling from Certain Federal Provisions

North Carolina chose to “decouple” from specific federal COVID-19 relief measures. This means some federal adjustments and exclusions did not apply to the state income tax calculation, requiring additional information on state forms to reconcile the difference.

Charitable Contributions and Medical Expense Deductions

  • Charitable contributions remained capped at 60% of federal adjusted gross income, unlike the temporary federal 100% limit.
  • Medical expense deductions continued to apply for expenses exceeding 7.5% of federal AGI.

These updates highlight why reviewing updated guidance each tax year is essential. Even minor adjustments in tax rate, deduction limits, or allowable credits can change your filing outcome.

Required Forms and Where to Find Them

Before you file your North Carolina tax return for 2021, it’s essential to have all necessary forms ready. The North Carolina Department of Revenue provides free downloads for all required state forms on its website, www.ncdor.gov. Using the correct forms ensures your state return is processed efficiently and without delays.

Primary Form

  • Form D-400 – Individual Income Tax Return
    Required for all taxpayers who must report income to the state. This is the primary document for calculating your state tax rate, applying deductions, and determining whether you owe or are due a refund.

Common Schedules

  • Schedule S – NC Adjustments for Individuals
    Used to add or subtract North Carolina-specific income adjustments from your federal tax return figures.
  • Schedule A – NC Itemized Deductions
    Completed when your itemized deductions are greater than the standard deduction.
  • Schedule PN – Part-Year Resident and Nonresident Schedule
    Allocates income between North Carolina and other states for part-year residents and nonresidents.
  • Schedule PN-1 – Other Additions and Deductions
    Used with Schedule PN when additional income adjustments are required.
  • Form D-400TC – Individual Income Tax Credits
    For claiming state-specific credits and exemptions.
  • Schedule AM – Amended Schedule
    Filed when making changes to a previously submitted return.

Special Notes for Part-Year Residents and Nonresidents

If you moved into or out of North Carolina during the tax year or earned income from North Carolina sources as a nonresident, you must complete Schedule PN. This ensures the state taxes the correct percentage of your income while exempting the portion earned elsewhere.

Step-by-Step Guide to Completing Your NC Tax Return

Filing your North Carolina tax return for 2021 requires careful preparation and accurate reporting. Follow these steps to ensure your return is complete and processed without delays.

Step 1 – Gather Your Documents

Before you begin, collect:

  • W-2 forms from all employers.
  • 1099 forms for interest, dividends, retirement distributions, or other income.
  • Your completed federal tax return.
  • Records of deductible expenses and exemptions.
  • Social Security numbers for yourself, your spouse, and dependents.
  • Bank account and routing numbers for direct deposit.

Step 2 – Personal Information and Filing Status

Enter your name, address, Social Security number, and county of residence. Select the same filing status you used on your federal tax return—single, married filing jointly, married filing separately, head of household, or qualifying widow(er).

Step 3 – Report Income and Adjustments

  • Transfer your federal adjusted gross income (AGI) from your federal return to the state form.
  • Add North Carolina-specific income adjustments using Schedule S.
  • Subtract eligible deductions and other taxes not applicable to North Carolina.

Step 4 – Choose Standard or Itemized Deductions

  • Use the standard deduction amounts provided for your filing status, or itemize deductions on Schedule A if they exceed the standard deduction.
  • Claim whichever deduction method results in the lower tax liability.

Step 5 – Calculate Tax and Apply for Credits

  • Multiply your taxable income by the flat tax rate of 5.25%.
  • Apply any tax credits using Form D-400TC.

Step 6 – Payments and Withholding

  • Enter North Carolina taxes withheld from W-2s and 1099s.
  • Include estimated tax payments made during the year.

Step 7 – Determine Refund or Balance Due

  • You will receive a refund if your total payments exceed the tax owed.
  • You must pay the difference if the tax owed exceeds the due amount to avoid penalties.

Step 8 – Sign, Date, and Review

  • Both spouses must sign if filing jointly.
  • Review your return for missing information, math errors, and unclaimed exemptions.
  • Keep a copy for your home records.

Filing Methods

North Carolina offers two primary ways to submit your 2021 state tax return—electronic and paper filing. Choosing the right option depends on your preferences for speed, security, and confirmation of receipt.

Electronic Filing (Recommended)

  • Faster processing: Electronic submissions through the North Carolina Department of Revenue’s eFile system are typically processed for direct deposit refunds within two to three weeks.
  • Fewer errors: The system automatically checks calculations and required fields.
  • Immediate confirmation: You’ll receive an electronic acknowledgment once your return is accepted.
  • Direct deposit: Refunds can be deposited directly into your bank account, avoiding mailing delays.

To eFile, visit www.ncdor.gov and select the “File and Pay” option. Follow the prompts to complete your return online or through an approved third-party provider.

Paper Filing

Some taxpayers prefer or need to submit their return by mail. When mailing, use the correct address based on whether you expect a refund or owe a balance:

  • For Refund Returns:
    NC Department of Revenue
    PO Box R
    Raleigh, NC 27634-0001
  • For Returns with Payment Due:
    NC Department of Revenue
    PO Box 25000
    Raleigh, NC 27640-0640

When filing by mail:

  • Include all required forms, schedules, and documentation.
  • If you pay by mail, write “2021 D-400” on your check or money order.
  • Allow up to six to eight weeks for processing paper returns.

How to Request a Filing Extension

You can request an extension if you need more time to file your 2021 North Carolina tax return. It’s important to remember that an extension to a file is not an extension to pay. You must still pay at least 90% of your taxes owed by the original due date to avoid penalties and interest.

Automatic Extension with a Federal Extension

If you received a federal extension from the IRS, North Carolina will automatically grant you a matching state extension. Simply check the appropriate box on Form D-400 when you submit your return. No separate state form is required in this case.

State-Only Extension

Suppose you did not request a federal extension but still need extra time to file. In that case, you can apply for a North Carolina–only extension by submitting Form D-410 to the North Carolina Department of Revenue. This form must be filed on or before the original due date of your return.

Payment Requirements

  • Pay online: Use the NCDOR “File and Pay” portal for bank draft or card payments.
  • Pay by mail: Send your check or money order with a completed D-410 or D-400V voucher.
  • Include identifying information such as your name, address, Social Security number, and the tax year (“2021”) on your payment.

Meeting extension requirements ensures you avoid late-filing penalties, even if you still owe state and local taxes.

How to Make a Payment

If your 2021 North Carolina tax return shows a balance due, you must submit payment by the deadline to avoid penalties and interest. The North Carolina Department of Revenue offers multiple payment methods to accommodate taxpayer needs.

Online Payment Options

  • Bank Draft (ACH): Securely pay directly from your account with no additional fee.
  • Credit or Debit Card: Pay using Visa or MasterCard; a convenience fee of $2.00 per $100 applies.
  • Access both options through the “File and Pay” section at www.ncdor.gov.

Check or Money Order

  • Make payable to: North Carolina Department of Revenue.
  • Must be drawn on a U.S. bank in U.S. dollars.
  • Include your name, address, Social Security number, and “2021 D-400” on the memo line.
  • Send the Form D-400V payment voucher to the correct mailing address for payments due.

In-Person Payment

Some taxpayers choose to pay in person at an NCDOR service center. Before visiting, check office hours and accepted payment types.

Payment Deadlines

  • Payment is due by the original filing deadline, even if you have an extension to file.
  • Paying on time helps avoid interest charges and ensures compliance with state and local taxes.

Paying your balance promptly ensures the revenue needed for public services and avoids additional costs for late payment.

How to Track Your Refund or Balance Due

After filing your 2021 North Carolina tax return, you can monitor your refund status or confirm any remaining balance. The North Carolina Department of Revenue offers two convenient ways to check this information.

Online Tool – “Where’s My Refund”

  • Visit www.ncdor.gov and select “Where’s My Refund.”
  • Available 24/7 for taxpayers who filed electronically or by mail.
  • You’ll need your Social Security number and the exact refund amount for your return.

Automated Phone Line

  • Call 1-877-252-4052 (toll-free) to access the automated refund system.
  • Follow the prompts and provide your Social Security number and refund amount.

Processing Timelines

  • Electronic returns: 2–3 weeks for direct deposit, 4–6 weeks for mailed checks.
  • Paper returns: 6–8 weeks.
  • Amended returns: 12–16 weeks.

Checking your status regularly helps confirm your return was received and processed. If you owe a balance, you can pay it immediately online or by mail to avoid extra taxes or penalties.

Final Filing Checklist

Review this checklist before submitting your 2021 North Carolina tax return to ensure everything is accurate and complete. Missing details can delay processing or lead to penalties.

  • Completed Form D-400 with all required information filled in.
  • All applicable schedules are attached (S, A, PN, PN-1, TC, AM).
  • Copies of W-2s and 1099s showing taxes withheld.
  • Copy of your federal tax return if required.
  • Payment voucher (Form D-400V) is included if you pay by check or money order.
  • The correct mailing address is used based on whether you owe or are due a refund.
  • Both spouses’ signatures if filing jointly.
  • Proof of mailing or electronic filing confirmation saved for home records.
  • Checked for common mistakes such as math errors or unclaimed exemptions.
  • Submitted on or before the deadline.

Completing this checklist helps taxpayers avoid costly delays and ensures compliance with state and local requirements.

Frequently Asked Questions

What would happen if I missed the May 17, 2022, deadline?

If you missed the extended deadline for your 2021 North Carolina tax return, file as soon as possible to reduce penalties and interest. The state charges a late-filing penalty plus interest on unpaid taxes. Paying promptly also minimizes the percentage owed in penalties. Even if you cannot pay in full, submit your return to show compliance and request a payment plan from the North Carolina Department of Revenue.

How do I request an extension for my 2021 return?

You can request a North Carolina filing extension by either having an approved federal extension, which the state automatically honors, or filing Form D-410 for a state-only extension. Remember, an extension to a file is not an extension to pay. You must pay at least 90% of your taxes by the original due date to avoid penalties and interest, even if your paperwork is submitted later.

Can I e-file my NC return for free?

The North Carolina Department of Revenue offers free electronic filing options through approved software providers for eligible taxpayers. Qualifications may depend on income level, age, or filing status. Visit ncdor.gov to review eligibility criteria and select the “NC Free File” program. E-filing helps avoid math errors, provides instant confirmation, and usually results in faster refunds than mailing your state return by paper.

What deductions are commonly missed on NC returns?

Commonly missed North Carolina deductions include the child deduction for those eligible for the federal child tax credit, the military retirement benefits deduction, and medical expenses exceeding 7.5% of federal adjusted gross income. Some taxpayers also overlook allowable state and local tax payments when itemizing. Reviewing updated tax year guidance ensures you claim every available deduction or exemption to reduce your overall tax rate and maximize potential refunds.

Can I file jointly if my spouse and I moved to/from NC mid-year?

If you filed jointly on your federal tax return, you could also file jointly for North Carolina, even if one spouse moved in or out during the tax year. Use Schedule PN to allocate income between state and non-North Carolina sources. This ensures the correct percentage of taxes applies only to income earned within North Carolina, while exempting qualifying amounts earned elsewhere during that year.

When do I need to pay estimated taxes in NC?

You must make quarterly estimated tax payments if you expect to owe $1,000 or more after subtracting withholding and credits on your North Carolina tax return. Use Form NC-40 or the online payment system to submit amounts on time. This requirement applies to residents, part-year residents, and some nonresidents. Paying on schedule avoids penalties and ensures compliance with state and local revenue rules for the applicable tax year.

What are the penalties for late filing and payment?

For 2021, North Carolina imposes a late-filing penalty of 5% of the unpaid monthly taxes, up to a maximum of 25%. Late-payment penalties are usually 10%, but these rates may vary. Interest accrues daily on unpaid balances from the original due date until paid. Submitting your state return promptly, even without full payment, helps minimize the cost of penalties and interest over time.

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