ITIN for FIRPTA Real Estate Sales: Getting Your 15% Back Without Mailing Your Passport

A non-resident selling US real property is one of the highest-stakes ITIN scenarios. The withholding is not a small inconvenience — it is 15% of the gross sale price, locked away with the IRS until you can file a return to claim it back. On a US$1 million sale, that is US$150,000 of your money sitting with the Treasury for somewhere between a few months (with planning) and well over a year (without).

This guide explains how FIRPTA works, where the ITIN sits in the process, and how Form 8288-B can move the withholding decision from "withheld first, refunded later" to "withheld in the right amount from the start."

What FIRPTA actually does

The Foreign Investment in Real Property Tax Act (FIRPTA) is the US tax framework that prevents foreign sellers from disposing of US real estate and leaving the country before paying tax on the gain. To enforce it, FIRPTA shifts the tax-collection burden onto the buyer:

• When the seller is a "foreign person" — generally any non-US-citizen, non-resident-alien individual or foreign entity — the buyer is required to withhold a percentage of the gross sale price and remit it to the IRS.
• The withholding is reported on Form 8288 by the buyer (or the buyer's settlement agent), with Form 8288-A issued to the seller as evidence of the withholding.
• The withheld amount is a prepayment of the seller's US tax liability on the sale, not a final tax. The seller files Form 1040-NR for the year of sale to compute the actual tax, claim credit for the withholding, and obtain a refund of any excess.

The standard rate is 15% of gross sale price. The rate can change based on the buyer's planned use and the sale price:

For most non-resident sellers, the default is 15% of gross. That is the figure you plan around.

Why "gross sale price, not profit" matters

The single most counter-intuitive thing about FIRPTA: it withholds from the sale price, not from the gain. A worked example:

The Treasury holds US$95,000 more than your actual tax until you file Form 1040-NR. That filing requires your ITIN. And the refund processing time, even after the return is filed correctly, runs 7 to 9 months typically — and the ITIN application itself can add 3 months if not yet obtained.

If you cannot afford to leave six figures with the IRS for the better part of a year, the answer is Form 8288-B.

Form 8288-B: the withholding certificate route

Form 8288-B is the FIRPTA Withholding Certificate Application. It asks the IRS to look at your projected tax liability on the sale and to issue a certificate authorising the buyer to withhold a reduced amount — or in some cases, zero — instead of the standard 15%.

The mechanics:

1. Before closing, the seller (with their representative or CAA) prepares Form 8288-B with a computation of the actual tax liability on the sale.
2. The application is filed with the IRS. The settlement agent at closing typically escrows the FIRPTA withholding rather than remitting it to the IRS.
3. The IRS reviews — target 90 days, often 90 to 120 in practice — and issues a Withholding Certificate.
4. The certificate authorises the settlement agent to release the escrowed funds to the seller, less the certified withholding amount.
5. Any remaining tax is settled when the seller files Form 1040-NR for the year of sale.

For the example above, an 8288-B application showing a US$40,000 actual tax liability would let the buyer release US$95,000 of the escrowed US$135,000 directly to the seller at closing (or shortly after), with US$40,000 remitted to the IRS as the appropriate withholding.

This compresses the cash flow timeline dramatically: instead of waiting a year for a US$95,000 refund, you collect it within roughly four months of closing.

Where the ITIN comes in

Every Form 8288-B requires the seller's US Taxpayer Identification Number. For a non-resident individual, that is the ITIN. Without it, the 8288-B cannot be processed and the default 15% withholding applies.

The IRS allows ITIN applications to be filed under specific FIRPTA exceptions, which makes the W-7 reasoning straightforward:

• Reason code (h) with the FIRPTA-related exception is the path.
• Supporting evidence typically includes the sales contract, the closing statement or HUD-1, the 8288-A issued by the buyer (post-closing) or projected 8288 (pre-closing), and either the 8288-B application or the 1040-NR return for the year of sale.

For sellers who plan ahead, the order is:

1. Sales contract signed; closing date scheduled.
2. ITIN application (W-7) submitted before closing, with reason (h) and FIRPTA exception documentation.
3. 8288-B prepared with the ITIN once issued.
4. At closing, withholding is escrowed pending the 8288-B determination.
5. Withholding Certificate received from the IRS; escrow released.
6. 1040-NR filed for the year of sale to finalise.

For sellers who did not plan ahead and have already closed:

1. ITIN application (W-7) submitted alongside Form 1040-NR for the year of sale, reason (b).
2. 8288-A from the buyer attached to the return as evidence of the withholding.
3. Refund processed by the IRS after the return is accepted.

The first path retrieves your cash in months. The second takes well over a year, in many cases.

Timeline reality check

Putting it all together, here are realistic timelines:

The variable is mostly IRS processing queue length, which is longer during the January–April peak season. Filing the 8288-B in summer or autumn tends to move faster than in March.

What buyers should know (even though it is your sale)

Buyers carry the legal responsibility for FIRPTA withholding. If a buyer fails to withhold, the IRS can pursue the buyer personally for the tax. This is why settlement agents and title companies routinely build FIRPTA compliance into the closing checklist whenever the seller is identified as foreign.

If you are the seller, do not be surprised when the title company asks for:

• Your passport copy and country of citizenship.
• Your ITIN (or W-7 in process).
• A FIRPTA affidavit one way or the other — either "I am not a foreign person" or "I am, and here is the withholding plan."

A buyer's lender may also require FIRPTA documentation. Anticipating this and having the ITIN paperwork ready can keep a tight closing on schedule.

Common mistakes

• Closing without addressing FIRPTA at all. Some buyers (or unsophisticated settlement agents) do not withhold, which makes the buyer personally liable. The seller may "get" the full proceeds, then receive an IRS letter later — sometimes years later — saying the buyer was supposed to withhold and the IRS is now collecting from the seller.
• Assuming an LLC removes FIRPTA. A single-member US LLC that is disregarded does not change the FIRPTA analysis. The IRS looks through to the foreign owner.
• Filing 8288-B too late. The 8288-B must be filed on or before the closing date for the escrow approach to work cleanly. Filing after closing means the withholding has already been remitted and recovering it shifts to the 1040-NR refund path.
• Wrong purchase price basis on 8288-B. The IRS computes the certificate against the actual gain. Mis-stating the cost basis or holding period leads to denials or revised certificates.

Capital gains rates for non-residents

The 8288-B and the 1040-NR both compute your actual US tax. For a non-resident individual selling real property, the federal rates are generally:

• Long-term capital gains (property held more than one year): 20% federal rate at the top, with lower bands.
• Short-term capital gains (held one year or less): taxed at the same graduated rates as ordinary income, up to 37%.
• State income tax applies separately in most states. Some states (Florida, Texas, Washington, etc.) have no state income tax; others impose their own withholding regimes that operate alongside FIRPTA.

Treaty positions can sometimes reduce these rates, depending on your country of residence and the specific income type. Treaty analysis is part of the 8288-B preparation.

Frequently asked questions

The FAQ section above covers the highest-stakes cases. If your sale closes in the next 90 days or has already closed within the last six months, time is the binding constraint — book an eligibility review immediately so we can identify the right path (8288-B vs 1040-NR refund) before the deadlines compress your options.