OBBBA and the Cash Method in 2026: the $32 Million Test, the Manufacturer Lane, and a July R&D Deadline

If your business earned an average of more than $32 million over the last three years, the IRS gets a vote in how you keep your books — and starting this year, that vote is shaped by the One Big Beautiful Bill Act. Miss the threshold math, and you could be forced onto the accrual method, lose a bundle of small-business simplifications, or leave a retroactive R&D deduction on the table that expires this July.

Here is what changed, who qualifies for what, and the exact checks to run before year-end.

Start With the Number That Controls Everything: $32 Million​

Under Section 448(c) of the tax code, your business meets the gross-receipts test — and keeps access to the small-business accounting simplifications — if its average annual gross receipts for the three tax years before the current one do not exceed an inflation-adjusted threshold. For tax years beginning in 2026, that threshold is $32 million, up from $31 million for 2025. The underlying statute still reads $25 million, the figure set by the 2017 tax reform; the IRS adjusts it for inflation each year and rounds to the nearest million.

Three details trip people up:

It is a three-year average, not a single bad year​

Add gross receipts for the three preceding tax years and divide by three. A single breakout year does not disqualify you if the two prior years pull the average back under the line. For a calendar-year business testing 2026, the measurement years are 2023, 2024, and 2025 — so the receipts you are booking right now decide next year's eligibility.

Related companies count together​

You cannot split one $40 million business into two $20 million entities to slip under the line. Gross receipts of related parties treated as a single employer — parent-subsidiary groups, brother-sister companies under common control — are aggregated for the test. If you own multiple entities, the test sees them as one.

Tax shelters are out, no matter how small​

A tax shelter, as defined in Section 448(d)(3), can never use the cash method, even with $1 of receipts. Syndicates and loss-shifting arrangements fall here; ordinary operating businesses do not.

Who Is Actually Forced Onto Accrual?​

The restriction bites a specific group: C corporations, and partnerships with a C corporation as a partner, whose three-year average exceeds the threshold. Everyone else — sole proprietorships, S corporations, partnerships without corporate partners — can generally use the cash method regardless of size.

Two long-standing exceptions survive for larger businesses: qualified personal service corporations (doctors, lawyers, accountants, and similar professional firms) and farming businesses can stay on cash even above the threshold. If you are a C-corp manufacturer or a partnership with corporate investors hovering near $32 million, this section is about you.

What the $32 Million Test Unlocks (It Is Not Just the Cash Method)​

Passing the test opens five doors at once. Failing it closes all five:

1. The cash method itself. Record income when received and expenses when paid, instead of when earned or incurred. For businesses that carry receivables, this usually defers tax — you are not paying tax on invoices your customers have not paid yet.
2. Freedom from UNICAP inventory capitalization (Section 263A(i)). Qualifying small businesses skip the complex uniform-capitalization rules that force larger companies to capitalize purchasing, storage, and handling costs into inventory.
3. Exemption from the business-interest limit (Section 163(j)). The 30%-of-adjusted-taxable-income cap on deducting business interest does not apply to businesses meeting the test — significant if you carry debt.
4. The small construction contract exception (Section 460). Home-construction and small construction contracts expected to finish within two years escape percentage-of-completion accounting.
5. Simplified inventory accounting (Section 471(c)). Qualifying businesses can treat inventories the way their financial books do, or even expense inventoriable items, instead of maintaining full tax inventories.

This bundling is why the threshold matters far beyond a bookkeeping preference: crossing it changes taxable income timing, interest deductibility, and inventory accounting simultaneously.

What OBBBA Actually Changed​

The One Big Beautiful Bill Act, signed July 4, 2025, touched this regime in two ways that matter for 2026 planning.

A higher lane for manufacturers: the $80 million threshold​

Post-enactment CPA summaries report that OBBBA raised the Section 448(c) threshold from the $25 million statutory base to $80 million (indexed for inflation) for certain taxpayers — principally manufacturers — unlocking the cash method, UNICAP relief, and the interest-limitation exemption for mid-size producers that previously aged out of every small-business simplification at once. The trade-off is a more expansive aggregation rule for related entities, so groups need to re-run the math rather than assume they qualify.

If you manufacture, produce, or refine tangible goods and your three-year average sits anywhere between $32 million and $80 million, this provision may be the single most valuable line in the new law for you. Confirm with your tax advisor whether your activities and ownership structure fit the qualifying definition — the general $32 million test still governs everyone else.

Permanent R&D expensing plus a retroactive small-business election​

OBBBA permanently restored immediate expensing of domestic research costs under new Section 174A for tax years beginning after 2024 — ending the five-year amortization that applied from 2022 through 2024. Critically for small businesses, taxpayers meeting the Section 448(c) test (measured at $31 million for the window) can elect to apply the fix retroactively to 2022–2024 by amending returns or filing an accounting-method change. Larger businesses can only take a catch-up deduction going forward.

The election deadline is July 6, 2026. If your company capitalized software development, engineering, or product-development costs in 2022–2024 and your three-year average was at or under $31 million, talk to your CPA now — this is a use-it-or-lose-it refund window, and reconstructing three years of R&E records takes time.

Should You Switch Methods While You Still Can?​

If you currently use accrual but your average sits under the threshold, switching to cash is often — not always — a win. The classic case: receivables substantially exceed payables at year-end. Moving to cash takes those unpaid invoices out of current taxable income, producing a negative Section 481(a) adjustment (a deduction). Businesses with heavy prepaid income or thin receivables can face the reverse, so model it first.

Mechanics, in brief:

• Consent is generally automatic. The IRS lists the accrual-to-cash change (and the hybrid — accrual for inventory purchases and sales, cash for everything else) as an automatic-consent change. You file Form 3115 with your timely filed return rather than begging for a private ruling.
• The 481(a) adjustment keeps you honest. It adds back income or deductions that would otherwise be duplicated or skipped in the changeover year. As a rule of thumb, a negative (favorable) adjustment comes off in the change year, while a positive (unfavorable) one spreads over several years.
• Mind the state follow-through. Most states start from federal taxable income but have their own method-change conformity quirks. A federal switch with no state analysis is half a plan.

Run the projection with your CPA in the fourth quarter, not in March when the return is already assembled.

The Bookkeeping Discipline That Makes All of This Possible​

None of these elections work without receipts-level records. Three habits separate businesses that capture the savings from those that discover the problem during an audit:

Keep a rolling three-year gross-receipts tracker. One spreadsheet, updated at each month-end close: trailing twelve months plus the two prior full years, averaged. When the line trends toward $32 million — or $80 million for a qualifying manufacturer — you want twelve months of warning, not a surprise at tax time. Remember that gross receipts means total sales net of returns plus service income, rents, royalties, dividends, and interest — not net profit.

Track receivables aging and payables separately from P&L. The cash-vs-accrual decision is fundamentally a balance-sheet question: how big is the gap between what you are owed and what you owe? If your books cannot produce an aging report in under a minute, you cannot model the switch.

Keep R&E and inventory costs in their own accounts. The retroactive R&D election requires identifying 2022–2024 research spending; the UNICAP and inventory exceptions require knowing what you capitalized. Costs buried in general expense accounts are costs you cannot elect on.

If your accounting lives in a system where every entry is explicit, reviewable, and version-controlled, these analyses take an afternoon. For teams that like that model, the docs walk through plain-text bookkeeping patterns — including parallel cash and accrual views of the same ledger — and the dashboard turns those books into receivables, aging, and trend views without a separate reporting tool.

Your Pre-Year-End Checklist​

1. Compute your three-year average gross receipts through 2025 and compare it against $32 million (or $80 million if you may be a qualifying manufacturer).
2. If you are near either line, aggregate related entities before concluding anything.
3. If you capitalized R&D in 2022–2024 and averaged $31 million or less, calendar the July 6, 2026 election deadline and start assembling records.
4. If you are on accrual but eligible for cash, model the Section 481(a) adjustment this quarter.
5. Confirm state conformity for any method change before filing Form 3115.

Simplify Your Financial Management​

Threshold tests, method changes, and retroactive elections all run on one fuel: clean, complete financial records. Beancount.io gives you plain-text accounting that is transparent, version-controlled, and AI-ready — so the numbers behind a $32 million test or a 481(a) adjustment are always auditable down to the entry. Get started for free and see why developers and finance professionals are switching to plain-text accounting.