Georgia Estimated Tax Payments 2026: Form 500-ES Dates, the 70% Rule, and the New 4.99% Rate

Georgia estimated tax payments for 2026 are due in four equal installments: April 15, June 15, September 15, 2026, and January 15, 2027, paid with Form 500-ES or through the Georgia Tax Center. The next deadline is September 15, the same day as federal Q3. Two mid-year changes make this a recalculation year: HB 463 cut Georgia's flat income tax rate from 5.19% to 4.99% for 2026, and the standard deduction jumped to $15,000 single / $30,000 married filing jointly, so installments sized in January are almost certainly too high.

Key takeaways:

• 2026 due dates: April 15, June 15, September 15, and January 15, 2027, at 25% each, matching the federal calendar
• The 2026 flat rate is 4.99% (HB 463, signed May 11, 2026), down from 5.19% in 2025
• Safe harbor is the lesser of 100% of your 2025 tax or 70% of your 2026 tax. Georgia has no 110% tier for high earners
• Missed installments accrue a penalty of 9% per year, computed per day on Form 500 UET
• The 2026 standard deduction is $15,000 single / $30,000 married filing jointly, and the dependent exemption rose to $5,000

Save this cheat sheet — the Georgia numbers in one image.

When Are Georgia Estimated Tax Payments Due in 2026?

Georgia splits individual estimated tax into four equal installments on the federal rhythm, per the Form 500-ES instructions:

If a date lands on a weekend or holiday, the deadline moves to the next business day; all four dates above fall on weekdays. Because the schedule mirrors the IRS calendar, September 15 is a double-payment day: federal Q3 per Form 1040-ES and Georgia's third voucher. That is different from California, which front-loads payments 30/40/0/30 and collects nothing in September. The estimated tax due-dates tool puts all four Georgia and federal dates on your calendar in one pass.

Who Must Pay Georgia Estimated Taxes?

You must file Form 500-ES if you reasonably expect your 2026 gross income to exceed your exemptions plus your estimated deductions plus $1,000 of income not subject to withholding. In plain terms: W-2 employees whose paychecks cover their Georgia tax owe nothing quarterly, while freelancers, contractors, landlords, partners, and S corp shareholders with meaningful untaxed income almost always cross the line.

Two groups get special treatment. Farmers and fishermen earning at least two-thirds of gross income from farming or fishing can skip quarterly vouchers entirely by filing their return and paying in full by March 1. And anyone with a W-2 job on the side has a repair tool the self-employed lack: Georgia treats withheld tax as paid evenly across all four installments no matter when it comes out of your paycheck, so raising your withholding late in the year can retroactively cover spring shortfalls.

Set Your Four Georgia Installments

The 70% Rule: Georgia's Safe Harbor for 2026

Georgia's required annual payment is the lesser of two numbers, straight from Form 500 UET:

This is the most forgiving safe harbor of any large state. The IRS demands 90% of the current year, and its prior-year option climbs to 110% once AGI passes $150,000; New York copies that structure. Georgia asks for 70% and holds the prior-year option at a flat 100% regardless of income. A high earner whose income doubles in 2026 can still anchor to 100% of a modest 2025 bill and settle the rest at filing, penalty-free.

The 70% route has a flip side: it is 70% of your actual 2026 tax, not of your guess. If income comes in hot and your payments land below the true 70%, Form 500 UET applies the 9% penalty per installment. When your income is unpredictable, the prior-year number is the safer anchor.

When the safe harbor does NOT protect you

• No 12-month 2025 return. The 100% option needs a full-year Georgia return to anchor to
• Wrong timing. The test runs per installment. Paying the full annual amount in January 2027 still leaves April, June, and September underpaid, and each shortfall accrues its own penalty
• Uneven income without the paperwork. Income that arrived mostly late in the year can lower earlier installments, but only through the annualized computation on Form 500 UET, not automatically

The 4.99% Rate Cut: Recalculate Your Remaining Installments

HB 463, signed May 11, 2026, reshaped the 2026 numbers retroactively to January 1. Per the Georgia DOR's tax updates page: the flat rate fell from 5.19% to 4.99%, the standard deduction rose from $12,000/$24,000 to $15,000/$30,000, and the dependent exemption went from $4,000 to $5,000. Through 2028, up to $1,750 of qualified tips and overtime pay is also excluded from Georgia income. Anyone who sized their vouchers in January used numbers that no longer exist.

Worked example. Tomás, a freelance mobile app developer in Atlanta (single, no dependents), projects $90,000 of net Schedule C profit for 2026. His self-employment tax is $12,717 (the self-employment tax calculator does this math), half of which is deductible, putting federal AGI at $83,642. Georgia starts from that AGI; the federal QBI deduction never enters, because it sits below the AGI line.

Tomás's 2025 Georgia tax was $3,700, so his safe harbor is the lesser of $3,700 or 70% × $3,425 = $2,398, which works out to $599 per installment. On the January math he would have targeted $2,603 (70% of $3,718). Recomputing before September 15 keeps roughly $205 of the year's payments in his pocket and leaves about $1,028 to settle at filing, with no penalty as long as the estimate holds.

How to Pay: Georgia Tax Center or Form 500-ES by Mail

The Georgia Tax Center (gtc.dor.ga.gov) is the free electronic route, and you do not need an account: use the Quick Payment option, select Social Security # as your ID type, pick "Estimated Payment" as the payment type, and authorize a bank debit. Scheduling ahead means the January 15, 2027 voucher can be queued today. Credit cards run through the state's processor with a fee.

Paying by mail means the 2026 Form 500-ES voucher for the correct quarter, with a check payable to "Georgia Department of Revenue," sent to: Processing Center, Georgia Department of Revenue, PO Box 740319, Atlanta, GA 30374-0319. One quirk of the electronic route: EFT payments must be set up before 3 p.m. ET on the last business day before the due date, so a September 15 morning setup is already late.

What Happens If You Miss a Payment? The Form 500 UET Penalty

Georgia charges 9% per year on each underpaid installment, counted per day from the installment's due date until you pay, computed on Form 500 UET when you file. The rate is fixed by the form, not adjusted quarterly the way the IRS underpayment rate is.

The per-day design rewards fast catch-up. If Tomás skips his $599 June installment and pays it on September 15 (92 days late), the penalty is $599 × 9% × 92/365 = about $14. Waiting until he files on April 15, 2027 (304 days) triples it to about $45. Small numbers on a small voucher, but they scale linearly: a $6,000 installment carried to filing costs roughly $450. Paying the moment you notice a miss always beats waiting for the next quarterly date.

Common Mistakes to Avoid

1. Running 2026 vouchers on 2025 numbers

The 5.19% rate and $12,000 deduction died with HB 463. Payments autopiloted from last year's worksheet overshoot on two variables at once; Tomás's version of that mistake was $293 of extra annual tax baked into every voucher.

2. Importing the federal safe harbor

Georgia's percentages are 70% and a flat 100%, not the IRS's 90% and 110%. Filers who dutifully pay 110% of prior-year Georgia tax because their AGI tops $150,000 are handing the state an interest-free loan roughly 10% larger than the law asks for. The federal quarterly guide covers the IRS side, which runs on its own rules.

3. Projecting Georgia tax from federal taxable income

Georgia starts from federal AGI and applies its own $15,000/$30,000 deduction. Starting from federal taxable income smuggles in the federal standard deduction ($16,100 single in 2026) and the QBI deduction, neither of which Georgia allows, and understates the state bill.

4. Fixing a missed quarter by overpaying the next one

A double payment on September 15 covers June's shortfall from September onward, but the June-to-September penalty days are already banked. Form 500 UET scores each installment separately.

Georgia is not the only state that rewrote its rates mid-cycle this year. South Carolina's H. 4216 rewrite cut most 2026 bills even harder, and the same recalculate-before-September-15 logic applies there.

The Right Number on All Four Dates: How Jupid Helps

A 4.99% flat rate makes the multiplication easy; knowing the income number to multiply is the hard part when you invoice irregularly. Jupid connects to your bank accounts, categorizes income and expenses with 95.9% accuracy, and keeps a live estimate of your Georgia and federal liability built from real transactions, not January guesses. When HB 463-style changes land mid-year, the projections move with them. Ask the AI accountant in WhatsApp or iMessage "what should my September 15 payments be?" and you get both the Georgia and IRS numbers with the safe harbor already applied. Try Jupid.

Action Checklist

• Recompute your 2026 Georgia tax at 4.99% with the $15,000/$30,000 standard deduction
• Compare 100% of your 2025 tax against 70% of the new 2026 estimate; take the smaller
• Missed April or June? Pay the shortfall now through Georgia Tax Center to stop the 9% clock
• Schedule the September 15 payment in GTC before 3 p.m. ET on September 14
• Working tipped or overtime shifts? Exclude up to $1,750 of that pay from your Georgia projection
• Queue the January 15, 2027 installment while you're logged in
• Pay federal Q3 the same day; the IRS calendar matches Georgia's

Sources

• Georgia DOR: Form 500-ES — who must file, installment dates, mailing address
• Georgia DOR: Important Tax Updates — the 4.99% rate and $15,000/$30,000 standard deduction for 2026
• Governor's office: HB 463 signing — rate cut effective January 1, 2026, tips/overtime exclusions
• Form 500 UET, Underpayment of Estimated Tax — the 70%/100% safe harbor and 9% penalty
• Georgia DOR: How Do I Make a Tax Payment — Georgia Tax Center payment options
• IRS: Form 1040-ES — the federal schedule running alongside Georgia's

This guide is for general educational purposes and does not constitute tax, legal, or accounting advice. Estimated tax requirements depend on your income mix, residency, filing status, and withholding, and Georgia's rate schedule can change again through HB 463's revenue triggers. For advice specific to your situation, consult a qualified tax professional or the Georgia Department of Revenue at dor.georgia.gov.