To get a Mississippi tax ID number, register your business for free through the Department of Revenue’s online Taxpayer Access Point at tap.dor.ms.gov; the state assigns your account number and mails your permit in about two weeks.1Mississippi Department of Revenue. Registration Information for Sales and Use Tax Applicants The same registration covers sales tax, use tax, and employer withholding, so you complete one application and select every tax type that applies to you.
Do You Actually Need One
Mississippi issues a state tax account number to any business that owes sales tax, use tax, withholding tax, or certain other state taxes. Three situations are the common triggers.
The first is selling. If you make retail sales of tangible personal property or taxable services in Mississippi, whether from a storefront, a booth, or an online platform delivering to Mississippi customers, you need a sales tax permit. The general state sales tax rate is 7%.2Mississippi Department of Revenue. Sales Tax Rates
The second is selling into Mississippi from out of state. Once your annual sales to Mississippi customers exceed $250,000 over the prior twelve months, you have economic nexus and must register for a use tax account and start collecting Mississippi use tax.3Mississippi Department of Revenue. Sales and Use Tax Guidance for Online Sellers
The third is hiring. Any employer paying wages in Mississippi must register for a withholding tax account so state income tax can be deducted from paychecks and remitted to the DOR.4Mississippi Department of Revenue. Withholding Tax Information
A few regulated industries have their own separate registration paths, including petroleum distributors, medical cannabis cultivators, and operators of heavy trucks or buses over 26,000 pounds gross weight.5Mississippi Department of Revenue. Register for Taxes If none of the three common triggers apply to you and you’re not in one of those industries, you probably don’t need a Mississippi tax account.
Get Your Federal EIN First
The Mississippi application asks for a federal identifier as the primary way to tie your state account to your business, so you need that number in hand before you open TAP. For most entities that means an Employer Identification Number from the IRS, which you can get instantly and at no cost on the IRS website.6Internal Revenue Service. Get an Employer Identification Number Sole proprietors can use a Social Security Number or Individual Taxpayer Identification Number instead.
The federal EIN and the Mississippi tax account number are two different numbers issued by two different agencies. The EIN handles federal returns, business bank accounts, and federal hiring paperwork.7U.S. Small Business Administration. Get Federal and State Tax ID Numbers The Mississippi number governs your state-level obligations: collecting sales tax, remitting withholding, and filing state returns. Most businesses end up with both.
What to Gather Before You Open TAP
Have everything ready before you start the application. Leaving to look something up mid-registration is how data entry errors happen, and errors cause processing delays.
- Your EIN, or your SSN or ITIN if you’re a sole proprietor.6Internal Revenue Service. Get an Employer Identification Number
- Legal business name, entity type (LLC, corporation, partnership, and so on), and your Secretary of State Business ID if you’ve registered with the Mississippi Secretary of State.
- Every Mississippi physical address where you operate or store inventory.
- Full legal name, title, home address, and SSN for each owner, partner, or corporate officer.
- The exact date of your first retail sale, first payroll, or whatever event triggers the tax obligation.
- Estimated monthly or annual sales and payroll figures. The DOR uses these to assign your initial filing frequency, so reasonable accuracy matters.
Registering Through the Taxpayer Access Point
All registration happens online through TAP at tap.dor.ms.gov. Select the option to register for taxes and begin a new taxpayer registration. Choose your entity type and enter your EIN or SSN.
The system walks you through screens for your legal business name, physical addresses, and activity start dates. The most important step is selecting the specific tax types you’re registering for: sales tax, use tax, withholding, or a combination. If you skip a tax type you actually owe, you’ll have to go back and add it later, and you may owe penalties on any collections you should have been making in the meantime.
After you enter estimated sales or payroll numbers, TAP assigns a preliminary filing frequency. Review the full application summary carefully before submitting. The final step is an electronic signature certifying that everything is accurate. You’ll get a confirmation number on screen. Save it. Your official Mississippi tax account number and sales tax permit arrive by mail in roughly two weeks.1Mississippi Department of Revenue. Registration Information for Sales and Use Tax Applicants
When a Bond Is Required
Most businesses register without paying a fee or posting a bond. Two situations are the exception. If you operate a business in Mississippi without a permanent physical location in the state, the DOR requires you to post a sales tax bond or an approved surety cash bond before it will issue your permit. Employee leasing companies registering for a withholding account face a separate bond equal to twice the withholding tax expected over a three-month period, which covers roughly six months of liability.5Mississippi Department of Revenue. Register for Taxes
After You Get Your Number
The DOR assigns your filing frequency; you don’t pick it. For sales and use tax, the annual tax you remit determines the schedule:
- Less than $600 per year: annual filing.
- $600 to $3,599 per year: quarterly filing.
- More than $3,599 per year: monthly filing.
Sales and use tax returns are due by the 20th of the month following the reporting period. A monthly filer’s January return is due February 20. If that date falls on a weekend or holiday, the deadline moves to the next business day.8Mississippi Department of Revenue. Reporting Requirements Withholding returns follow a tighter schedule, due by the 15th of the month following the reporting period, with frequencies ranging from daily to monthly based on payroll volume.9Mississippi Department of Revenue. Withholding Tax
File every return on time even if you had no sales or payroll for the period. A zero-dollar return keeps you in good standing. Missing a return, even one where nothing was owed, can trigger penalty notices and eventually put your permit at risk. All tax payments run through TAP electronically, and you can pay through TAP even if you file a paper return.10Mississippi Department of Revenue. Make Online Tax Payments
One quirk worth knowing: Mississippi does not use formal resale certificates. When you buy inventory for resale, you give your vendor the sales tax permit number printed on your Mississippi permit. That number is your proof of resale status and exempts the wholesale purchase from tax. Without a valid permit number, your supplier will charge you the full 7%.
Any change to your business needs an update through TAP: a new location, a change of mailing address, adding or removing an owner, or shutting down. Outdated information means missed correspondence and missed deadlines, both of which carry financial consequences.
If You’re Buying an Existing Business
This catches new owners off guard. Under Mississippi law, if you buy the assets of an existing business, you can inherit the seller’s unpaid tax debt. The statute requires the buyer to withhold enough of the purchase price to cover any outstanding taxes, penalties, and interest, and to hold that money until the seller produces either a DOR receipt showing the liability was paid or a certificate confirming no taxes are due.11Justia Law. Mississippi Code 27-65-55 – Liability of Seller and Purchaser
Skip that step and let the seller’s taxes go unpaid after 10 days, and you become personally liable for the full amount. The DOR can also pursue the purchased assets as though no sale ever happened.11Justia Law. Mississippi Code 27-65-55 – Liability of Seller and Purchaser Request a tax clearance certificate from the DOR before closing, and you protect yourself from a debt that isn’t yours.