Form 8288-B Explained (2026): How to Reduce FIRPTA Withholding Before Closing

If you are selling U.S. property as a foreign person, FIRPTA generally requires 15% of the gross sale price to be withheld at closing.

However, you may be able to reduce or eliminate that withholding by applying for a Withholding Certificate using Form 8288-B.

In this 2026 guide, we explain how Form 8288-B works, when to file it, and how it affects your closing timeline.

If you are new to FIRPTA rules, start here:
FIRPTA Explained (2026): Complete Guide for Foreign Sellers of U.S. Property.

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What Is Form 8288-B?

Form 8288-B is an application submitted to the IRS to request a reduced withholding amount under FIRPTA.

Instead of automatically withholding 15% of the full sale price, the IRS may approve a lower withholding amount based on the seller’s expected capital gains tax liability.

This can significantly improve liquidity at closing.

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When Should You File Form 8288-B?

Timing is critical.

The application should generally be filed:

• Before closing, or
• On or before the date of transfer

If properly filed before closing:

• The buyer may delay sending the withheld funds to the IRS while waiting for IRS determination.

Failure to file early can result in full 15% withholding at closing.

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Why Would a Seller File Form 8288-B?

Sellers typically apply when:

• The actual capital gain is much lower than 15% of the sale price.
• The property was owned for a long period and basis is high.
• The expected tax liability is significantly less than withholding.

Example

Sale price: $1,000,000
Standard FIRPTA withholding (15%): $150,000

Actual capital gain: $120,000
Estimated capital gains tax: $24,000

Without 8288-B: $150,000 withheld
With approved certificate: Possibly closer to $24,000 withheld

This prevents over-withholding.

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Step-by-Step: How the Process Works

Step 1: Calculate Estimated Tax Liability

The seller estimates actual capital gains tax owed.

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Step 2: Complete Form 8288-B

The form includes:

• Property details
• Sale price
• Adjusted basis
• Estimated gain
• Estimated tax owed
• Supporting documentation

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Step 3: Submit Application to IRS

The seller submits Form 8288-B with supporting documentation.

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Step 4: IRS Reviews Application

The IRS evaluates whether reduced withholding is justified.

Processing times vary and may take several weeks.

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Step 5: IRS Issues Withholding Certificate

If approved, the IRS specifies the reduced withholding amount.

The buyer withholds only the approved amount instead of 15%.

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Does Filing 8288-B Delay Closing?

Not necessarily.

If filed on time:

• The buyer may withhold funds but delay remitting them to the IRS until determination.
• Closing can proceed.

However, coordination with escrow and tax advisors is important.

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What Documentation Is Required?

Common supporting documents include:

• Purchase price documentation
• Improvement costs
• Settlement statements
• Estimated closing costs
• Gain calculation worksheet

Accurate documentation increases approval likelihood.

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What Happens If You Don’t File Form 8288-B?

If no withholding certificate is requested:

• Full 15% is withheld at closing.
• Seller must file tax return later to claim refund.

For refund timing details, see:
FIRPTA Refund Timeline: What to Expect in 2026.

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Common Mistakes When Filing 8288-B

1. Filing Too Late

Submitting after closing may not prevent full withholding.

2. Underestimating Documentation

Incomplete submissions may delay processing.

3. Incorrect Gain Calculation

Overly aggressive reduction requests can trigger scrutiny.

4. Confusing 8288-B with 8288-A

Form 8288-A reports withholding after closing.
Form 8288-B requests reduction before closing.

For more on reporting forms, read:
Form 8288 & 8288-A Explained (2026 Guide).

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Frequently Asked Questions

How long does the IRS take to process Form 8288-B?
Processing times vary but may take several weeks depending on IRS workload.

Can withholding be eliminated completely?
Possibly, if estimated tax liability is zero.

Is Form 8288-B required?
No. It is optional but beneficial when tax liability is lower than 15%.

Does approval eliminate the need to file a tax return?
No. The seller must still file a U.S. tax return.

Can a tax professional file this on my behalf?
Yes. Many foreign sellers work with cross-border tax professionals.

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Final Thoughts

Form 8288-B is one of the most important tools available to foreign sellers under FIRPTA.

When used properly, it can:

• Prevent excessive withholding
• Improve cash flow at closing
• Reduce refund delays
• Align withholding with actual tax liability

Planning early — before closing — makes the biggest difference.

If you are preparing to sell U.S. property as a foreign national, begin with the complete FIRPTA guide here:
FIRPTA Explained (2026): Complete Guide for Foreign Sellers of U.S. Property.

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