Here is the catch for 2027: the IRS has not published a 2027 Form 1040-ES. The latest verified instructions are the 2026 form. This guide covers the most recent address, how to prepare the payment, and what to do if something goes wrong. It also separates 2026 payments due in January 2027 from 2027 tax-year payments.
Information current as of the IRS materials reviewed, which show the 2026 Form 1040-ES as the current form. Recheck IRS.gov before every payment.
Key Takeaways
- No 2027 Form 1040-ES address is published yet; verify on IRS.gov before mailing.
- The 2026 form lists a Charlotte P.O. Box for taxpayers in a foreign country.
- Never use the Form 1040 return address or a Form 1040-V address for an estimate.
- Pay in U.S. dollars, and keep proof of mailing and tax-year designation.
Where Should You Mail Form 1040-ES for 2027 Tax Payments?
The foreign-country address for Australian taxpayers
The 2026 Form 1040-ES directs foreign-country taxpayers to mail the voucher and payment to:
Internal Revenue Service P.O. Box 1303 Charlotte, NC 28201-1303 USA
This is the address on the 2026 Form 1040-ES. A 2027-specific address remains unconfirmed: the IRS "About Form 1040-ES" page, last updated 17 September 2026, still shows the 2026 form, and the "Where to file" tables cover calendar year 2025 only.
The IRS has also issued a correction notice saying 2026 forms printed before 13 February 2026 might carry an address change. An old printout is a real risk.
Why Australia generally uses foreign-country instructions
Your mailing address is set by your IRS filing category and where you live. It is not set by where your preparer sits, where your U.S. bank is, or which state you left. Do not pick a domestic lockbox simply because you once lived in a particular state.
2026 payments due in 2027 versus 2027 estimated payments
Two different tax years overlap in early 2027:
- Tax year 2026: instalments fall on 15 April, 15 June and 15 September 2026, and 15 January 2027. The January payment is not needed if you file your 2026 return by 31 January 2027 and pay the balance with it.
- Tax year 2027: the IRS early-release draft of Publication 509 shows 15 April, 15 June and 15 September 2027, and 15 January 2028. It is a draft, so treat the dates as provisional.
Check the tax year printed on the voucher you use, and confirm the address for that specific payment.
Exceptions and special filing categories
The 2026 form's shared foreign-country address row also covers:
- American Samoa and Puerto Rico
- APO/FPO addresses
- Form 2555 or Form 4563 filers
- Dual-status aliens
- Non-permanent residents of Guam or the U.S. Virgin Islands
Bona fide residents of Guam and the U.S. Virgin Islands have separate territory instructions. Follow the category that actually applies to you.
Keep other IRS and state payments separate
Form 1040-ES covers estimated instalments. Form 1040-V accompanies a balance due on a filed Form 1040. The 1040-ES instructions say not to mail a return to the estimate address, nor an estimate to the return address. State and Australian tax payments go to their own authorities, never in the same envelope.
How to Prepare and Mail an Estimated Tax Payment
Complete the voucher
- Use the voucher for the correct tax year and instalment.
- Enter your name, address and SSN. Use an ITIN only if no SSN applies, and switch to the SSN once issued.
- On a joint voucher, list names and SSNs in the same order as on the joint return.
- Enclose the payment with the voucher. Do not staple or attach it.
Double-check that your Australian address is written clearly, since the IRS uses it for correspondence.
Prepare the cheque or money order
- Make it payable to United States Treasury.
- Write your SSN and "2026 Form 1040-ES" (or the relevant year) on it.
- Pay in U.S. dollars. Never send cash.
- Photocopy or scan the completed cheque.
IRS guidance does not state that a cheque from an Australian bank is barred. Confirm with your bank that a U.S.-dollar instrument is accepted and clears.
Address the envelope accurately
Write the recipient address in the order shown above, with "USA" on the final line. Add your full return address and enough international postage.
Only USPS can deliver to a P.O. Box. The 2026 form says a private delivery service cannot be used for an estimated payment that must go to a P.O. Box. DHL, FedEx and UPS street addresses for IRS processing centres are not substitutes for the Charlotte P.O. Box.
Mail early and preserve evidence
International mail is slower and less predictable than domestic mail. The timely-mailing rule under IRC 7502 does not apply to a payment deposited with another country's postal service, so an Australia Post postmark will not necessarily protect you.
Use a tracked service with a dated receipt, and keep:
- The completed voucher and a copy of the payment
- Postal receipt and tracking history
- Bank-clearing evidence
Pre-mail checklist
- Tax year and instalment correct
- Amount in U.S. dollars
- SSN or ITIN on voucher and payment
- Payee: United States Treasury
- Current IRS address, with "USA"
- Return address and full postage
- Proof of mailing saved
Recheck the address and procedures before every instalment.
Who Needs to Pay and When Are Payments Due?
What Form 1040-ES covers
Estimated payments cover income tax, self-employment tax and other liabilities not fully met by withholding. Typical sources include contracting, business profits, investments, rent, foreign income and one-off gains.
Having such income does not automatically trigger a payment. You must estimate your liability and compare it with withholding and credits.
Who may need to make estimated payments
Under Publication 505 (2026), you generally need estimated payments when both apply:
- You expect to owe at least $1,000 after withholding and credits
- Withholding will be less than the smaller of 90% of 2026 tax or 100% of 2025 tax
The prior-year figure rises to 110% if 2025 AGI exceeded $150,000 ($75,000 if married filing separately). Confirm the final 2027 worksheet with the IRS when it is released; the figures above are from 2026 Publication 505.
Publication 54 confirms that U.S. citizens and resident aliens abroad generally follow the same rules as those in the United States. Foreign tax credits and the foreign earned income exclusion affect the calculation, but do not automatically remove the obligation. If you expect to claim the exclusion on Form 2555, Publication 505 points to Worksheet 2-8.
2027 payment deadlines and professional support
The automatic two-month extension for taxpayers abroad extends the annual return, not the instalment dates. Interest still runs on unpaid tax. Disaster postponements apply only where an IRS announcement covers your location and deadline.
VJM Global's U.S.-compliant tax professionals can help Australia-based taxpayers review Form 1040 obligations and estimated-tax calculations, including foreign tax credit alignment with Form 1116. Payments go directly to the IRS, and no outcome is guaranteed.
Electronic Alternatives, Address Errors, and Final Checks
Electronic payment options from Australia
| Option | Status for Australian taxpayers |
|---|---|
| Direct Pay | Needs a U.S. bank routing number; foreign banks and SWIFT not accepted |
| IRS Online Account | Bank-account method is not a foreign-bank option |
| EFTPS | Individual use ends 12 November 2026 |
| Debit/credit card | Available through approved processors, which charge fees |
| Same-day wire | Accepted in U.S. dollars via a foreign bank with a U.S. banking relationship |
Card fees listed by the IRS include a debit fee of about $2.10 to $2.15 and credit fees of 1.75% to 1.85% (minimum $2.50). The IRS receives none of it. For wires, complete the Same-Day Taxpayer Worksheet and give it to your bank, which may charge its own fee.
Compared with mailing, electronic payment gives faster confirmation and a clearer record. Mail avoids needing a U.S. bank account but adds delay and uncertainty. Currency conversion costs apply either way.
What to do if an old address was used
Do not assume forwarding or penalty relief. IRS procedures send discovered remittances to Receipt and Control and use the earliest receipt date. If that cannot be determined, the postmark is used, then the remittance date. Official IRS guidance does not guarantee forwarding for every outdated 1040-ES address.
The estimated-tax penalty is based on the amount underpaid, how long, and quarterly interest rates. Reasonable cause alone generally does not waive it, and First Time Abate does not apply. Keep proof of mailing, monitor your IRS account, and contact the IRS or a tax professional if the payment goes missing or a penalty notice arrives.
Check official sources before every payment
Use the current Form 1040-ES page, IRS payment pages and the Where to File guidance. A downloaded form or pre-addressed envelope may be outdated. Note the page's revision date each time.
Final mailing checklist
- Correct tax year and instalment
- Current 1040-ES address for filers outside the U.S.
- Voucher details, amount and payee
- Postage, tracking and saved evidence
- Federal and state payments kept separate
- Confirmation that this is an estimate, not a Form 1040 balance due
Frequently Asked Questions
What is the address for estimated tax payments?
For foreign-country taxpayers, the latest verified address is IRS, P.O. Box 1303, Charlotte, NC 28201-1303, USA, from the 2026 form. A 2027 address is not yet published, so verify before mailing.
How do I mail a return to the IRS?
The address depends on the form, your location and whether payment is enclosed. A Form 1040 or 1040-V payment uses the return table, not the 1040-ES address.
Where do I mail Form 1040-ES from Australia for 2027 payments?
Follow the IRS foreign-country instructions, then confirm the current address and any exception for your category.
Is a payment due in January 2027 for tax year 2026 or 2027?
It is the fourth instalment for tax year 2026. Tax year 2027 payments begin in April 2027. Follow the voucher's tax-year label.
Can I pay my 2027 estimated taxes electronically from Australia?
Yes, through card payments or a same-day wire. Direct Pay needs a U.S. bank account. Confirm eligibility and fees on IRS.gov.
What should I do if I mailed a payment to an old IRS address?
Keep proof of mailing, watch your IRS account and notices, and contact the IRS or a tax professional if it is delayed or misapplied.
