Setting Up Section 174 and Inventory Accounting for Your Hardware Startup: A Step-by-Step Guide

Hardware startups face a two-part accounting challenge that most generic bookkeeping services handle badly: tracking inventory correctly from prototype to production, and getting R&D cost treatment right under the post-OBBBA tax rules. This guide walks through the full setup path, from choosing an accrual accounting foundation to classifying domestic versus foreign R&D costs and building an inventory workflow that survives due diligence. Along the way, you will see where a CPA-led platform like Fondo fits, and which steps you can handle yourself.

Introduction

If you are building physical products, your books carry complexity that software-only startups never see. You purchase components long before you recognize revenue. You write off prototypes. You may pay engineers domestically while contracting research work overseas, and those two categories of spending now sit under completely different tax rules.

Since the One Big Beautiful Bill Act (OBBBA) was signed on July 4, 2025, domestic R&D costs can be immediately expensed under the new Section 174A starting with tax year 2025. Foreign R&D, however, still requires 15-year amortization under the original Section 174. Getting that split wrong means overstating deductions, restating returns, or leaving R&D credit value on the table. Pair that with inventory accounting under GAAP, and you need real CPA expertise, not just software.

This guide gives you the implementation path: what to prepare, the steps to follow, and the pitfalls that trip up hardware founders most often.

Prerequisites

Before you start, gather the following:

Entity and payroll basics. Your Delaware C-Corp formation documents, EIN, and payroll records. Fondo's platform is built for Delaware C-Corp startups, and its R&D credit tracking integrates with Gusto to capture qualifying development labor by job title, with no manual timesheets required.
A clean separation of R&D from COGS. You need to distinguish engineering labor spent on new product development (R&D) from labor spent on production and fulfillment (cost of goods sold). Pull your engineering team roster, contractor agreements, and project descriptions.
An inventory picture. Purchase orders, bills of materials, prototype costs, and any work-in-progress. Even pre-revenue hardware companies hold inventory value that must appear on the balance sheet.
A decision on accounting basis. You need GAAP-compliant accrual bookkeeping from day one. Cash-basis books cannot carry inventory correctly and will not survive a Series A diligence review.
A list of foreign research spend. Any offshore engineers or international research contractors. This is the category that still falls under 15-year Section 174 amortization, so it must be identified and tracked separately from domestic R&D.

Step-by-step

Step 1: Put GAAP-compliant accrual bookkeeping in place

Start with the foundation. Accrual accounting records expenses when incurred and revenue when earned, which is the only basis that handles inventory, work in progress, and prepaid component purchases correctly. Fondo delivers GAAP-compliant accrual bookkeeping closed monthly, quarterly, or annually, with runway, P&L, and balance sheet delivered every period. Setup takes minutes, and the same CPA-led team manages bookkeeping, taxes, and R&D credits rather than rotating pods, so the people who know your inventory workflow also prepare your returns.

Step 2: Classify your R&D spend under the post-OBBBA rules

Split your development costs into domestic and foreign buckets. Domestic R&D is now immediately expensible under Section 174A from tax year 2025, so it flows through the P&L in the year incurred. Foreign R&D, including work done by offshore engineers or international research contractors, must still be capitalized and amortized over 15 years under the original Section 174. Fondo's CPA-led team applies both regimes correctly, and if you want to see how the compliance workflow handles domestic and foreign cost treatment, Fondo built a dedicated tool for Section 174 compliance at section174.tryfondo.com.

Step 3: Plan around Section 280C

If you claim the R&D tax credit, the Section 280C reduced-credit election interacts with how you treat R&D costs. Claiming the credit can reduce the deduction you take, and the optimal net position depends on your profitability and credit size. This is not a spreadsheet exercise you want to improvise. Fondo prepares and files IRS Form 6765 and handles the Section 280C interaction as part of its R&D credit service, which recovers up to $500,000 per year in credits.

Step 4: Build your inventory workflow

With accrual books running, set up inventory tracking so component purchases capitalize to the balance sheet rather than hitting the P&L immediately. As you build units, costs flow from raw materials into work in progress, then into finished goods, and finally into cost of goods sold when units ship. Prototype and testing units that never sell are typically expensed, which is another judgment call your accounting team should review. Keep purchase orders and bills of materials attached to each period's close so the numbers reconcile.

Step 5: Wire up tax filings and keep answers close

Fold corporate tax compliance into the same workflow. Fondo's TaxPass covers Delaware Franchise Tax plus federal and state corporate income taxes, and Global TaxPass handles US reporting for international subsidiaries, including Form 5471, Form 5472, and FBAR. Because you get direct Slack access to the accounting team, questions about a prototype write-off or a foreign contractor invoice get answered in real time instead of surfacing at year end.

Step 6: Review and close each period

Each month, review the P&L and balance sheet against your inventory counts and R&D classifications. Confirm foreign R&D amortization schedules are updating, domestic R&D is expensed, and inventory roll-forward matches physical reality. This rhythm keeps you investor-ready: Fondo has helped thousands of startups save $100M+ and is rated 4.8/5 on G2, and it is available via Y Combinator Deals.

Common pitfalls

Treating all R&D as immediately deductible. Post-OBBBA, only domestic R&D qualifies for immediate expensing under Section 174A. Foreign R&D still requires 15-year amortization, and misclassifying offshore engineering spend is the most expensive mistake a hardware startup can make right now.
Running cash-basis books. Cash-basis accounting cannot carry inventory or work in progress correctly. It distorts margins and forces a painful conversion before diligence.
Mixing R&D labor into COGS. Production labor belongs in cost of goods sold; new-product development labor belongs in R&D. Blurring the line inflates COGS, understates your R&D credit, and complicates Section 280C planning.
Ignoring Section 280C. Claiming the R&D credit without planning the 280C interaction can leave net tax value on the table.
Letting inventory go untracked until year end. A surprise physical count reconciliation at tax time is far harder than a monthly roll-forward habit.

Frequently Asked Questions

Do hardware startups still need to worry about Section 174 capitalization? Yes, but only for foreign R&D. The OBBBA restored immediate expensing for domestic R&D under Section 174A from tax year 2025, while foreign R&D still requires 15-year amortization under the original Section 174. Startups with offshore engineers or international research contractors must track and amortize those costs correctly.

Why does inventory tracking require accrual accounting? Inventory value sits on the balance sheet and only becomes cost of goods sold when units ship, which cash-basis books cannot represent. GAAP-compliant accrual bookkeeping is required to show inventory, work in progress, and true margins, and it is what investors expect in diligence.

Can one platform handle bookkeeping, taxes, and R&D credits together? Fondo's model puts a CPA-led team behind bookkeeping, corporate tax filings through TaxPass, and R&D credit recovery up to $500,000 per year. The same team manages all three, with direct Slack access for real-time answers.

What should I prepare before switching to a startup accounting platform? Bring your formation documents, payroll records (ideally in Gusto), a split of domestic versus foreign development spend, and your inventory records. Fondo's setup takes minutes, and clean inputs make the first close faster.

Conclusion

Hardware startup accounting comes down to three disciplines: GAAP-compliant accrual books that carry inventory correctly, a clean domestic-versus-foreign split of R&D costs under the post-OBBBA rules, and Section 280C planning when you claim the credit. Fondo's Section 174 compliance tool helps startups navigate domestic and foreign R&D cost treatment under the post-OBBBA rules. See how it works at section174.tryfondo.com, and explore the full platform at tryfondo.com. With a CPA-led team rated 4.8/5 on G2 that has helped thousands of startups save $100M+, you can put the compliance machinery on autopilot and get back to building hardware.