How to Fill Out and File Georgia Form ST-3: Sales and Use Tax Return

Georgia businesses report state and local sales and use tax on Form ST-3, filed electronically through the Georgia Tax Center at gtc.dor.ga.gov. The return is due by the 20th day of the month following each reporting period, and any business owing more than $500 must file and pay online.¹ The state rate is 4 percent of the sales price, with local taxes stacked on top depending on where each sale is sourced.²

What to Pull Together Before You File

Accuracy on ST-3 depends on clean records for the reporting period. Before you open the return, gather:

Total gross sales, including leases and rentals sourced to Georgia.
Documentation for exempt sales. If you can’t produce a signed Form ST-5 or ST-4 during an audit, the sale is treated as taxable.
Use tax purchases, meaning items your business bought without paying Georgia sales tax (typically out-of-state purchases consumed in the state).
County-level breakdowns of taxable activity. Local rates differ by jurisdiction, so you need to know how much of your activity falls in each county where sales are sourced.
Bank statements and point-of-sale reports to support the numbers you enter.

Georgia requires dealers to keep these records for at least three years after each taxable transaction.³ Holding onto them longer is sensible if you’ve claimed large deductions or exemptions.

Working Through Form ST-3

ST-3 has several parts. Part A summarizes what you owe. Parts B and C show the jurisdiction-by-jurisdiction detail. Part D calculates the vendor compensation credit you earn for filing and paying on time.

Part A: Tax Summary

Line 1 captures total state sales, including leases and rentals. Line 2 is total exempt state sales. Note that a sale exempt from the 4 percent state tax still belongs on Line 2 even when it remains subject to local tax. Line 3 is the difference, which gives you taxable state sales.⁴

Lines 4 through 7 carry totals from the detailed schedules in Parts B and C: state sales tax, use tax, TSPLOST tax, and prepaid local motor fuel tax. Line 8 is the total sales and use tax you actually collected from customers during the period, taken straight from your accounting records. Line 9 sums Lines 4 through 7. Line 10 is any excess tax collected, meaning the difference between what you collected and what the schedules say you owe. Line 11 subtracts your vendor compensation. Line 12 subtracts prepaid estimated tax from a prior period, and Line 13 adds current prepaid estimated tax. Line 14 is your total amount due.⁴

Part B: State and Local Tax Detail

Part B is where you break down sales and use tax by jurisdiction. Georgia has seven types of local option sales taxes, including LOST, SPLOST, ESPLOST, HOST, MARTA, TSPLOST, and Transit SPLOST, and the combination that applies depends on the county. Allocate taxable sales to each county where the transaction is sourced and apply the correct local rates. If you operate in multiple counties, each gets its own line on the schedule. Misallocating county figures is one of the fastest ways to draw a notice from the Department of Revenue.

The use tax section in Part B captures items your business purchased without paying Georgia sales tax, commonly equipment or supplies bought online from out-of-state vendors. You owe the same 4 percent state rate plus applicable local rates on those purchases.²

Part D: Vendor Compensation Credit

Georgia gives dealers a small credit for filing and paying on time. The math: 3 percent of the first $3,000 in combined sales and use taxes due (capped at $90), plus 0.5 percent of everything above $3,000. Motor fuel taxes carry their own 3 percent credit line. File late or pay late and you lose the whole credit for that period. There is no partial credit for being a day off.⁵

Submitting the Return and Paying

Almost all ST-3 returns are filed through the Georgia Tax Center at gtc.dor.ga.gov. If you owe more than $500, electronic filing and payment are mandatory by statute.¹ Below that threshold, the DOR still recommends filing online for faster processing and immediate confirmation.

Log into GTC, go to the File Return interface, pick the correct reporting period, and enter the figures from your completed ST-3 worksheets. Follow the on-screen verification prompts and submit. The system generates a confirmation number. Save or print it. That number is your proof of filing and records the exact submission time.

Payment happens in the same session. GTC accepts ACH debit and credit card payments, and you can either pay immediately or schedule a payment for the due date. If you qualify to mail a paper return because your balance is $500 or less, the signed form must be postmarked by the 20th of the month after the reporting period. Confirm the current mailing address on the ST-3 instructions before sending anything by mail.

When the Return Is Due

Returns are due by the 20th day of the month after the reporting period closes. Most Georgia businesses file monthly, but you can submit a written request to the DOR to move to a quarterly or annual schedule if your volume supports it.⁶ When the 20th lands on a weekend or state holiday, the deadline shifts to the next business day.

What a Late Return Costs

Missing the deadline triggers two separate penalties under O.C.G.A. § 48-8-66, one for failure to file and one for failure to pay. Each is the greater of 5 percent of the tax due or $5 for the first month, with an additional 5 percent or $5 for each additional month or partial month the delinquency continues. Each penalty caps at the greater of 25 percent of the tax or $25.⁷

Interest runs on top of the penalties. Since July 2016, the annual rate equals the Federal Reserve prime rate plus 3 percent, reset each January, and accrues monthly from the original due date until you pay in full.⁷ Factor in the lost vendor compensation credit, and the real cost of a late filing is the penalties, the interest, and the forfeited credit combined.

Fixing a Return After You File It

If you catch an error after submitting, correct it through GTC rather than mailing a paper form. Open your Account Summary, find the period that needs correction, click View Return, then click Amend. Make your changes and confirm. The amended return runs through the same submission process as the original.⁸

If You Sell From Out of State or Through a Marketplace

Out-of-state sellers become Georgia dealers obligated to collect and remit tax once they exceed either $100,000 in gross Georgia sales revenue or 200 separate retail transactions delivered to Georgia buyers in the previous or current calendar year. Crossing either threshold triggers the obligation.⁹

Marketplace facilitators carry their own duty. Once combined facilitated and direct retail sales sourced to Georgia hit $100,000 in a calendar year, the facilitator must collect and remit state and local tax on every facilitated sale. Those sales get reported under a designated marketplace facilitator account on GTC, separate from any direct sales the facilitator makes.¹⁰ If you sell through a marketplace that already collects Georgia tax on your transactions, you generally don’t collect it again on those same sales, but you still need your own Georgia registration and still report your direct sales on your own ST-3.

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Justia. Georgia Code 48-2-32 – Forms of Payment
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Justia. Georgia Code 48-8-30 – Imposition, Rate, and Collection of Tax
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Georgia Secretary of State. Georgia Code 560-12-1 – Administrative Rules and Regulations
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Georgia Department of Revenue. Sales and Use Tax Return ST-3 Instructions
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Justia. Georgia Code 48-8-50 – Compensation of Dealers for Reporting and Paying Tax
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Justia. Georgia Code 48-8-49 – Dealers Returns as to Gross Proceeds of Sales and Purchases
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Georgia Department of Revenue. Penalty and Interest Rates
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Georgia Department of Revenue. File a Return – FAQ
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Justia. Georgia Code 48-8-2 – Definitions
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Georgia Department of Revenue. Marketplace Facilitators