Georgia Form 600: Filing, Net Worth Tax, and Deadlines

Georgia Form 600 is the annual return a C corporation files with the Georgia Department of Revenue to report both corporate income tax and the net worth tax on one document. You start from federal taxable income on Form 1120, make the Georgia adjustments on Schedules 1 through 9, add the graduated net worth tax, and file by the 15th day of the fourth month after your tax year ends. For calendar-year filers, that is April 15, 2026.¹ The income tax rate for tax years beginning on or after January 1, 2025, is 5.19%, and the net worth tax tops out at $5,000.²

Who Files Form 600

Every domestic corporation organized under Georgia law files Form 600 regardless of where its income is earned. A foreign corporation (one organized in another state or country) files if it owns property in Georgia or earns income from sources in the state. An LLC that has elected to be taxed as a corporation federally also files Form 600 and owes both taxes.³ S corporations do not use this form; they file Form 600S instead.

What to Have in Front of You

The federal return is the backbone of the Georgia return. Line 1 of Schedule 1 pulls directly from federal taxable income, and you must attach a complete copy of Form 1120 and its supporting schedules.⁴ Before you open Form 600, pull together:

The prior year’s ending balance sheet. Georgia’s net worth tax is based on net worth at the close of the preceding tax year, not the current year.³
Gross receipts broken out between Georgia and everywhere else, if you operate in more than one state. You need both figures for the apportionment ratio on Schedule 7.
Records of interest from other states’ bonds, state and foreign income taxes deducted federally, and interest on U.S. government obligations. Each requires an adjustment on the Georgia return.
Officer names and titles, your registered agent, and any parent company information the form asks for.

Calculating Georgia Income Tax

Start with federal taxable income from Form 1120, measured before the federal net operating loss and special deductions. Then apply the adjustments in O.C.G.A. § 48-7-21.⁵ The two you will almost always use:

Add back interest income from bonds issued by other states or their subdivisions that was excluded federally, and add back any state, local, or foreign income taxes deducted on the federal return.
Subtract interest and dividends on U.S. government obligations that were included in federal gross income but are exempt from state tax under federal law.

The result is Georgia taxable net income. Multiply by 5.19% for tax years beginning on or after January 1, 2025.¹ Georgia allows a net operating loss deduction on Schedule 9, subject to the 80% limitation described in the IT-611 instruction booklet.⁶

Apportionment for Multi-State Corporations

If your corporation earns income inside and outside Georgia, you don’t pay tax on all of it. Schedule 7 divides gross receipts from business within Georgia by gross receipts everywhere to produce a Georgia ratio. Schedule 6 applies that ratio to apportionable business income, and income that belongs specifically to Georgia (such as rents from Georgia property) is added separately on Schedule 6, Line 6.⁶ Foreign corporations compute a separate ratio for the net worth tax on Schedule 8.

Calculating the Net Worth Tax

The net worth tax is a separate liability reported on the same form.⁷ Net worth is figured from the prior year’s ending balance sheet and includes issued capital stock, paid-in surplus, and retained earnings, with both tangible and intangible assets factored in.³

The tax is graduated. Corporations with net worth of $100,000 or less owe nothing. The full table under O.C.G.A. § 48-13-73:⁸

$100,001 to $150,000: $125
$150,001 to $200,000: $150
$200,001 to $300,000: $200
$300,001 to $500,000: $250
$500,001 to $750,000: $300
$750,001 to $1,000,000: $500
$1,000,001 to $2,000,000: $750
$2,000,001 to $4,000,000: $1,000
$4,000,001 to $6,000,000: $1,250
$6,000,001 to $8,000,000: $1,500
$8,000,001 to $10,000,000: $1,750
$10,000,001 to $12,000,000: $2,000
$12,000,001 to $14,000,000: $2,500
$14,000,001 to $16,000,000: $3,000
$16,000,001 to $18,000,000: $3,500
$18,000,001 to $20,000,000: $4,000
$20,000,001 to $22,000,000: $4,500
Over $22,000,000: $5,000

A corporation that comes into existence or first becomes subject to the tax during an initial period of less than six months owes half the amount in the table.⁸ Schedule 3 combines income tax and net worth tax, applies any business credits, and nets prepayments to produce a single balance due or refund.¹

Deadlines, Extensions, and Estimated Payments

Form 600 is due on the 15th day of the fourth month after the close of the tax year. Calendar-year filers face an April 15, 2026 deadline.¹

If the IRS grants you an automatic six-month federal extension, Georgia extends the state return the same amount, and no separate state request is needed.⁹ Without a federal extension, file Georgia Form IT-303 for a state extension. Either way the extension caps at six months, giving you seven months total from the original due date.¹ The extension does not postpone payment. Any tax owed is still due by the original deadline, and you remit it with Form IT-560C and a check or money order payable to the Georgia Department of Revenue.¹⁰

Corporations that expect to owe income tax should pay quarterly estimates on Form 602-ES.¹¹ Failure to pay estimated tax carries a 5% penalty on the income tax due plus underpayment interest at 9% per year.¹

How to Submit the Return

Georgia participates in the IRS 1120 Fed/State Corporate E-file program, so most commercial corporate tax software can transmit Form 600 at the same time as the federal return.¹² You can also use the Georgia Tax Center at gtc.dor.ga.gov to pay and manage the corporate account.¹³ Electronic filing is mandatory for any return that generates, allocates, or claims series 100 tax credits.¹⁴

Paper returns go to:

Georgia Department of Revenue
Processing Center
PO Box 740397
Atlanta, Georgia 30374-0397⁶

Send paper returns by certified mail or another tracked method so you have proof of the filing date. Make checks and money orders payable to the Georgia Department of Revenue and include a payment voucher so the funds credit to the right account.

If You File or Pay Late

Georgia runs separate penalty schedules for the income tax and the net worth tax, and they stack on the same return.

On the income tax side, late filing costs 5% of the unpaid tax for each month or partial month, capped at 25%.¹⁵ Late payment adds 0.5% per month or partial month, also capped at 25%.¹ The late-filing penalty is waived when the failure is due to reasonable cause rather than willful neglect.

Net worth tax penalties are flatter: 10% of the tax due for delinquent filing and 10% for delinquent payment.¹ Because the maximum net worth tax is $5,000, those dollar amounts stay small, but they compound with the income tax penalties on the same late return.

Interest runs on any unpaid balance from the original due date at the Federal Reserve prime rate plus 3%, reviewed by the Department of Revenue each January.¹⁶

If You Disagree With an Assessment

For notices issued on or after July 1, 2025, you have 45 days to file a protest with the Department of Revenue after receiving a notice of proposed assessment or a refund denial. If the department issues an Official Assessment and Demand for Payment, you have 45 days to petition the Tax Tribunal or the Georgia Tax Court.¹ Calendar the deadline the day the notice arrives; the window is short.

1
Georgia Department of Revenue. 2025 IT-611 Corporate Income Tax Instruction Booklet
2
Georgia Department of Revenue. Corporate Income and Net Worth Tax
3
Georgia Department of Revenue. Net Worth Tax for Corporations – FAQ
4
Georgia Department of Revenue. C Corporations – FAQ
5
FindLaw. Georgia Code Title 48 Revenue and Taxation 48-7-21
6
Georgia Department of Revenue. Georgia Form 600 – Corporation Tax Return
7
Georgia Department of Revenue. Taxes for Corporations
8
FindLaw. Georgia Code Title 48 Revenue and Taxation 48-13-73
9
Georgia Department of Revenue. Requesting an Extension
10
Georgia Department of Revenue. IT-560C Corporate Extension Payment Voucher
11
Georgia Department of Revenue. 602 ES Corporate and Partnership Estimated Tax
12
Georgia Department of Revenue. Corporate Electronic Filing
13
Georgia Department of Revenue. Taxes for Business
14
Georgia Department of Revenue. Electronic Mandate Requirements for Filing Income Tax Returns
15
Justia Law. Georgia Code 48-7-57 – Penalties for Failure to File Timely
16
Georgia Department of Revenue. Penalty and Interest Rates