Form 2210 is a US federal form, so this guide is for Australian-based individuals, business owners, and investors who file US returns (Form 1040, 1040-SR, 1040-NR, or 1041). "2026" here means the 2025 Form 2210 and its instructions, used for returns filed in 2026.
We'll cover whether you need the form, how the penalty is calculated, how to seek relief, and what records to gather.
Key Takeaways
- Most filers don't attach Form 2210 because the IRS calculates the penalty itself.
- File it to request a waiver, use Schedule AI, or use actual withholding dates.
- Avoiding, reducing, and waiving a penalty are three different routes.
- Always check the 2025 instructions for thresholds, dates, and rates.
What Form 2210 Is and When You Need It
Form 2210, Underpayment of Estimated Tax by Individuals, Estates, and Trusts, tests whether you paid enough tax during the year. The IRS says to use Form 2210 to see if you owe a penalty for underpaying estimated tax.
The form creates no new tax. It documents or calculates a penalty tied to late or insufficient estimated payments or withholding.
Three Charges That Get Confused
- Underpayment penalty: missed or short installments during the year.
- Balance due: the tax you still owe when you file.
- Failure-to-pay penalty: a separate charge when tax isn't paid by the due date.
When to File and When Not To
The IRS generally calculates the penalty and tells you not to file. You file only if a Part II box applies:
| Part II box | Situation | What to file |
|---|---|---|
| A | Waive the entire penalty | Page 1 only |
| B | Waive part of the penalty | Calculate the penalty and waiver amount |
| C | Uneven income (annualized method) | Calculation plus Schedule AI |
| D | Actual withholding dates give a lower penalty | Calculation |
| E | Joint return for 2024 or 2025, but not both | Page 1; calculate only if B, C, or D also applies |
If none applies, don't file. When a Part II box does apply, attach the form to your Form 1040, 1040-SR, 1040-NR, or 1041.
Check the instructions for special cases:
- No penalty applies to a decedent's estate for tax years ending before two years after death
- Fiscal-year taxpayers follow different installment dates under Publication 505
- Farmers and fishers use Form 2210-F, which this guide doesn't cover
How to Use Form 2210 Instructions to Calculate an Underpayment Penalty
The form has three parts, and you work through them in order.
- Part I (Required Annual Payment): combines current-year tax, prior-year tax, withholding, and credits to find what you should have paid.
- Part II (Reasons for Filing): selects a waiver, annualized income, or withholding-date treatment.
- Part III (Penalty Computation): compares required and actual payments by installment date, then applies the rates.
Check the Safe Harbours First
For 2025, timely estimated payments plus withholding need to equal the smaller of 90% of 2025 tax or 100% of 2024 tax. The 2024 return must cover 12 months.
If 2024 AGI exceeded $150,000, the prior-year figure becomes 110% (the AGI threshold is $75,000 for married filing separately).
No penalty applies if 2025 total tax minus withholding is under $1,000. Confirm every figure against the current Form 2210 instructions.
Why Timing Matters
Calendar-year 2025 installments were due:
- April 15, 2025
- June 16, 2025 (June 15 fell on a Sunday)
- September 15, 2025
- January 15, 2026
The IRS compares what should have been paid by each date with what was credited by that date. Withholding is generally treated as paid one-fourth on each due date, whatever the actual timing. Estimated payments count on the day you make them.
How the Penalty Is Priced
Each shortfall is measured for the period it stays unpaid, at the quarterly underpayment rate. The IRS lists quarterly interest rates of 7% for each 2025 quarter and for 2026 Q1, and 6% for 2026 Q2. Rates are annual and compound daily. Always read the current table before calculating.
A Practical Workflow
- Gather the 2025 Form 2210 and instructions, your 2024 and draft 2025 returns, and withholding records.
- Collect estimated-payment confirmations with dates.
- Compare your required annual payment with each installment.
- Test the regular method, then the annualized method, withholding-date treatment, and waiver.
IRS Penalty Relief: Waivers, Exceptions, and Annualized Income
Exception, Reduction, or Waiver
- Exception: no penalty applies at all, such as the $1,000 test.
- Reduction: a lower calculation, via Schedule AI or actual withholding dates.
- Waiver: a request the IRS must review and may refuse.
Don't assume that a refund or a small final balance proves you owe no installment penalty. The test is by installment date.
Requesting a Waiver
All or part of the penalty may be waived if, in 2024 or 2025, you retired after age 62 or became disabled and the underpayment was due to reasonable cause, not willful neglect.
A casualty, disaster, or other unusual circumstance that makes the penalty inequitable also qualifies.
Approval isn't automatic. Attach a statement covering:
- The event and its dates
- Your expected and actual payment history
- How the event caused the underpayment
- The relief requested
Support it with records that fit your facts:
- Retirement or disability documentation
- Disaster notices, insurance, or damage records
- Payment confirmations
Retirement and disability requests need the retirement date and age, or the disability date. No document guarantees approval.
For federally declared disasters, the IRS generally identifies covered taxpayers and applies relief automatically, so don't file Form 2210 for that reason alone.
Annualized Income With Schedule AI
Schedule AI suits seasonal, back-loaded, or irregular income, such as a late-year capital gain or a delayed business receipt. It recalculates required installments based on income through each period instead of assuming income arrived evenly.
- Use it for all due dates or none.
- Attach Form 2210 Parts I-III and Schedule AI.
- Keep period-by-period records of income, deductions, self-employment income, withholding, and payments.
Actual Withholding Dates
If most of your withholding landed late in the year, check box D and file Form 2210 to use actual dates. This can lower the penalty compared with the default even split.
Form 2210 relief is separate from other IRS programmes such as First-Time Penalty Abatement, which addresses different compliance penalties. Apply the estimated-tax underpayment rules that govern Form 2210.
Filing Form 2210 in 2026: Documents, Deadlines, and Common Errors
Attach Form 2210 to your original return when a Part II box applies. If you amend, attach any form related to the change. The Form 1040-X instructions note, for example, that a $1,500 check covering $1,400 of tax and a $100 estimated-tax penalty means line 16 shows $1,400.
If the IRS Already Billed You
A CP30 notice reports an assessed underpayment penalty. Review it and pay any balance by the stated date.
To seek a reduction, include a waiver statement and supporting documents. IRS grounds include:
- Qualifying retirement or disability
- Early withholding
- Uneven income
A CP2000 is different: it proposes changes based on third-party information and is not a Form 2210 notice.
Preparation Checklist
- Current Form 2210 and instructions
- 2024 return and 2025 draft return
- W-2 or equivalent withholding information, plus relevant 1099s
- Estimated-payment confirmations and bank records with dates
- Income records and Schedule AI data
- For waivers: your written explanation and event evidence
Common Errors
- Using the wrong tax-year form
- Entering total payments without dates
- Mixing up estimated payments and withholding
- Omitting Schedule AI or the waiver statement
- Assuming a late catch-up payment erases an earlier shortfall
- Assuming an IRS-calculated notice can't be challenged
- Mistyping the estimated-tax line, the usual cause of a CP23 mismatch notice
Before you file, check your entries against the official instructions, the current rate table, and any disaster deadline announcements.
Practical Next Steps for Australian Taxpayers with US Obligations
Residency matters here. Resident aliens generally follow Publication 505. Nonresident aliens use Form 1040-ES (NR).
If you have no US wages, the nonresident estimated-tax schedule is:
- One-half due by 16 June
- One-quarter due by 15 September
- One-quarter due by 15 January
An extension to file is not an extension of the estimated-tax schedule. Publication 54 confirms taxpayers overseas have the same estimated-tax requirements as those in the US.
Your action plan:
- Review prior-year tax, current income, withholding, and payments.
- Identify whether a safe harbor, exception, annualized calculation, or waiver may apply.
- Set a recurring review of US estimated payments and keep proof of payment dates.
- Check Australian tax and reporting obligations separately with an adviser who knows Australian rules.
Paying from Australia is straightforward:
- IRS Direct Pay and the IRS Online Account accept estimated payments
- Without a US bank account, wire US dollars from a foreign bank using the Same-Day Taxpayer Payment Worksheet
VJM Global offers US individual return preparation (Form 1040 and 1040-NR) and international tax services. If you'd like a fact-specific review of your estimated-tax position, contact the team at [email protected]. Relief depends on your records, eligibility, and the current IRS rules.
Frequently Asked Questions
What is Form 2210 and what does it do?
It determines whether you underpaid estimated tax and, where applicable, calculates the penalty, reduces it, or requests a waiver.
Do I need to complete Form 2210?
Usually not, because the IRS calculates the penalty. File only if a Part II box applies, such as a waiver request, Schedule AI, or actual withholding dates.
How is Form 2210 calculated?
It starts with the required annual payment, then compares required and actual payments by installment date. Each shortfall is charged at the IRS quarterly rate for the time it stays unpaid.
How much do I need to pay to avoid an underpayment penalty?
Generally the smaller of 90% of 2025 tax or 100% of 2024 tax (110% if 2024 AGI exceeded $150,000). Payments must arrive on time. Confirm against the 2025 instructions.
How can I avoid a Form 2210 penalty?
Pay through withholding or estimated payments by each due date, plan around a safe harbour, and use Schedule AI if income is uneven. Review waiver options if a qualifying event occurred.
What triggers an underpayment penalty from the IRS?
Not paying enough through withholding or estimated payments by an installment date. Exceptions, such as the $1,000 test, and relief provisions may still apply.
