Many non-U.S. residents delay applying for an ITIN because they are unsure if it is required. Others assume withholding tax is final and do nothing. Unfortunately, this often leads to lost refunds and IRS issues.
At Nolly.com, we help clients correct these problems every day. This guide explains what happens if you do not apply for an ITIN when one is required.
The IRS Still Tracks Your Income
Even without an ITIN, the IRS receives income reports from:
- Casinos
- Property buyers
- Financial institutions
- Employers
- Investment firms
This means the IRS already knows income was earned, even if you never filed a return.
You Cannot File a 1040NR Without an ITIN
If you earn U.S. income as a non-resident, you must file a 1040NR tax return.
Without an ITIN, the IRS will not process the return or issue a refund.
This stops many people from recovering money they are legally owed.
Withholding Becomes Final
- Many types of U.S. income are subject to withholding.
- Without filing a return using an ITIN, that withheld tax becomes permanent, even if your actual tax should have been lower.
This is common with:
- Casino winnings
- Rental income
- FIRPTA property sales
- Investment income
You May Lose Refund Eligibility
- Refunds must be claimed within a time limit.
- If you wait too long to apply for an ITIN and file a return, you may permanently lose the right to recover overpaid tax.
Real Estate Sales Are Delayed
- Non-U.S. sellers of U.S. property often face FIRPTA withholding.
- Without an ITIN, sellers cannot file forms to reduce withholding or claim refunds.
This can delay access to tens of thousands of dollars.
IRS Letters and Follow-Ups
- In some cases, the IRS sends letters requesting compliance.
- Responding without an ITIN makes resolution slower and more complicated.
Common Reasons People Delay
- Fear of paperwork
- Uncertainty about requirements
- Concern about mailing passports
- Belief that withholding is final
These concerns are understandable but usually unnecessary with professional help.
Why Applying Early Is Better
Applying early gives you:
- Access to refunds
- Clear tax records
- Compliance peace of mind
- Faster processing
It also prevents future complications.
How Nolly.com Helps
At Nolly.com, we:
- Verify identity securely
- Prepare accurate ITIN applications
- Handle supporting tax documents
- Submit complete packages
- Track IRS processing
Clients avoid delays and mistakes.
Final Thoughts
If you need an ITIN and do not apply, you risk losing money and creating future tax problems. Applying early protects your refunds and keeps you compliant.
Start your ITIN application with Nolly.com today. Our certified experts make the process clear and stress-free.
Published December 26, 2025. General information, not tax advice. Nolly Services Inc is a private company and is not part of the IRS.
