Tariff Tax Deductions Small Business: 2026 Guide

You just got the customs invoice. The tariffs alone added 15% to your landed cost, and your controller is asking whether any of it is deductible. The short answer is yes—but the method matters, and getting it wrong means leaving real money on the table or, worse, inviting scrutiny.

This guide walks through every deduction category available to import-heavy small businesses in 2026, explains how each one works mechanically, and shows where your accounting setup can make or break the outcome.

How the IRS Treats Tariff Costs

The IRS defines a business deduction as an amount subtracted from income when filing taxes, and requires documents to support every expense or loss claimed. Tariff payments are not a special category—they follow the same ordinary-and-necessary standard as any other cost of doing business.

The practical question is how you record them, because that controls when you get the deduction.

Option 1 — Cost of goods sold. When you import inventory and pay duties at the border, those tariff payments become part of the cost basis of that inventory. The deduction flows through COGS when the inventory is sold, which reduces taxable income dollar-for-dollar. For product-based businesses carrying stock, this is the standard treatment.

Option 2 — Current-year business expense. Import costs that are not tied to specific inventory—broker fees, freight on non-inventory shipments, compliance consulting—are deductible in the year incurred.

Most import businesses use both simultaneously. The critical discipline is keeping them in separate ledger accounts so you can reconstruct the classification if the IRS asks.

The Full Deduction Map: What Qualifies in 2026

Direct Import Costs

Every dollar paid to move goods from a foreign supplier to your U.S. warehouse is a candidate for deduction:

• Customs duties and tariffs paid to U.S. Customs and Border Protection
• Section 301 tariffs on Chinese imports
• Section 232 steel and aluminum tariffs
• Anti-dumping and countervailing duties
• Customs broker fees
• Ocean freight, air freight, and last-mile delivery
• Marine insurance on international shipments
• Port handling and terminal charges
• Fumigation and inspection fees required for customs release

Operating Costs That Support Import Activity

These run through your P&L as ordinary business expenses:

• Storage and warehousing for imported inventory pending sale
• Trade attorney fees for classification disputes or exclusion requests
• Software subscriptions for import management and compliance tracking
• Currency conversion costs and documented exchange losses
• Travel to foreign supplier facilities (keep contemporaneous logs)
• Translation services for foreign-language contracts and certifications
• International wire transfer fees

Section 179 and Equipment Purchases

If you are buying equipment—forklifts, warehouse racking, scanning systems—to handle the increased import volume, Section 179 lets you expense qualifying purchases immediately rather than depreciate them over years. The 2026 deduction limit is $2.56 million, with phase-out beginning at $4.09 million in total purchases. For most small import operations, the limit is not a constraint; the issue is simply remembering to elect it.

Bonus depreciation, historically useful for the same purpose, is phasing down and is scheduled to fully phase out in 2027 under the current schedule. Take Section 179 over bonus depreciation for any 2026 equipment purchase where both apply.

The 20% Pass-Through Deduction

If your import business operates as an S-corp, partnership, or sole proprietorship, the Section 199A qualified business income deduction allows you to deduct up to 20% of qualified business income. This deduction was made permanent as part of 2026 tax legislation—it is no longer a planning variable that expires. Factor it into your entity-level tax projections.

Duty Drawback and Foreign Trade Zones

If you import goods and subsequently re-export some of that inventory, duty drawback is worth a dedicated conversation with your customs broker. A 2026 small-business tax guide notes that qualifying businesses can recover up to 99% of duties paid on re-exported goods. Foreign Trade Zones offer a related deferral mechanism. These programs have real administrative requirements—you cannot apply them retroactively without proper procedures in place—but the dollar recovery can be substantial for businesses with export activity.

Documentation: What Survives an Audit

The IRS is explicit: taxpayers must keep records that support the deductions they claim. For tariff-related costs, that means:

• Customs entry summaries (CBP Form 7501) for every shipment—these are the primary source documents for duties paid
• Commercial invoices from foreign suppliers showing item description, quantity, and declared value
• Broker invoices itemizing fees separately from duty amounts
• Freight and insurance receipts tied to specific shipments
• Inventory records showing which imported lots have been sold (to support COGS timing)

Store digital copies. Paper customs documents fade and misplace easily. The CBP also provides electronic entry records through the ACE portal—export those to your document management system as each entry closes.

For COGS reconciliation, your accounting software must track tariff costs at the lot or SKU level if you carry multiple imported product lines. A spreadsheet bolted to your general ledger is not adequate once you are managing more than a handful of SKUs.

Deduction Timing: A Quick Reference

How Sagenext Helps

Tracking tariff costs at the lot level, reconciling COGS timing across multiple import vendors, and maintaining the audit trail the IRS requires—these tasks are manageable in QuickBooks Desktop or Sage 50, but only when everyone working the books is in the same data file, in real time.

Sagenext hosts QuickBooks Desktop, QuickBooks Enterprise, Sage 50, Sage 100, and a range of other accounting applications on fully managed cloud infrastructure. Your controller, your CPA, and your customs broker can each access the live file through a secure remote desktop session without emailing copies back and forth. Sagenext handles provisioning, backups, security patches, and software updates—your team focuses on the accounting, not the IT. If you want to see whether the hosted environment fits your workflow before committing, offers a free trial with no credit card required.

For additional guidance on structuring import accounting in QuickBooks, QuickBooks Hosting A Practical Setup Guide For CPA Firms covers setup steps specific to product-based businesses.

Frequently Asked Questions

Are tariffs deductible as a business expense in 2026?

Yes. Tariff payments are deductible as ordinary and necessary business expenses under IRS rules. The specific treatment depends on what you are importing: duties on inventory typically flow through cost of goods sold and reduce taxable income when the inventory is sold, while duties on non-inventory purchases are deducted in the year incurred. Either way, you need customs entry summaries and supplier invoices to substantiate the deduction.

Can I deduct Section 301 tariffs on Chinese imports?

Yes. Section 301 tariffs are treated the same as other customs duties for tax purposes—they are a cost of acquiring imported goods and qualify as a deductible business expense. If the goods go into inventory, the tariff becomes part of COGS. If you also applied for a Section 301 exclusion and received a refund, that refund reduces your deductible cost in the year received.

What is duty drawback, and is it worth pursuing?

Duty drawback is a U.S. Customs program that refunds most of the duties paid on imported goods that are subsequently exported. For qualifying businesses, the refund can reach up to 99% of duties paid. The program has specific procedural requirements—you need to file claims within statutory deadlines and maintain records linking import entries to export transactions. If your business re-exports even a small portion of imported inventory, a licensed customs broker can model whether the recovery justifies the administrative cost. publishes detailed guidance on drawback procedures.

How does tariff cost interact with the Section 199A deduction?

Section 199A lets pass-through owners deduct up to 20% of qualified business income, and the deduction is now permanent. Higher tariff costs reduce net income, which mechanically reduces the 199A deduction amount. That is one more reason to take every available import deduction accurately—understating COGS inflates net income and overstates your effective tax burden relative to what the business actually earned.

What records do I need to keep for tariff deductions?

At minimum: CBP Form 7501 (the customs entry summary) for every import shipment, commercial invoices from foreign suppliers, customs broker invoices showing duties and fees separately, and freight and insurance receipts. For inventory-based businesses, you also need records that reconcile which imported lots have been sold, because COGS deductions are only allowable when the inventory is disposed of. The IRS requires documentation sufficient to reconstruct the expense; keep records for at least three years from the filing date, longer if you have carried-forward losses.

Key Takeaways

• Tariff payments on imported inventory are deductible as COGS when the inventory is sold; non-inventory import costs are deductible in the year incurred.
• The 2026 Section 179 limit is $2.56 million—use it for equipment purchases that support import operations instead of relying on bonus depreciation, which phases out in 2027.
• The Section 199A 20% pass-through deduction is now permanent; accurate import cost tracking directly affects the QBI base.
• Duty drawback can recover up to 99% of duties paid on re-exported goods—worth evaluating if any portion of your imported inventory leaves the U.S.
• Every tariff deduction requires contemporaneous documentation: CBP entry summaries, supplier invoices, and broker statements at a minimum.
• Cloud-hosted accounting software lets your entire team work in a single live file, which is the practical foundation for maintaining the audit-ready records these deductions require.