Cash vs. Accrual Accounting for Contractors

One of the most consequential decisions a contractor makes isn't about a job — it's about the books. Whether you account for income and expenses on a cash or accrual basis affects your taxes, your cash-flow visibility, your financial reporting, and even how profitable each job appears.

Most contractors start on the cash method because it's simpler. As the business grows, accrual often becomes more useful — and past a point, the IRS requires it. Here's how the two compare, and how to choose intentionally rather than being forced to switch.

Cash Basis Accounting

Under the cash method, you record income when you actually receive payment and expenses when you actually pay them. It tracks the movement of cash in and out of your account.

Example: You finish a $40,000 job in December but aren't paid until January. On the cash method, that income lands in the following year, when the money hits the bank.

Accrual Basis Accounting

Under the accrual method, you record income when it's earned (the work is performed or the invoice is issued) and expenses when they're incurred — regardless of when cash changes hands.

Example: That same $40,000 December job is recorded as December income under accrual, even though payment arrives in January.

Key Differences at a Glance

• Timing of income: Cash = when received. Accrual = when earned.
• Timing of expenses: Cash = when paid. Accrual = when incurred.
• Complexity: Cash is simpler. Accrual requires tracking receivables, payables, and retainage.
• Financial picture: Cash mirrors your bank balance. Accrual better reflects true job profitability.
• Tax planning: Cash gives more control over the timing of income. Accrual matches income and expenses more accurately.

Cash Basis: Pros and Cons for Contractors

Advantages

• Simplicity — easier bookkeeping and fewer adjustments.
• Tax deferral — you can often push income into the following year by managing when you collect.
• Cash-flow focus — the books track your actual bank balance, which many owners find intuitive.
• Lower administrative burden — less need to track receivables and payables closely.

Disadvantages

• Incomplete profitability picture — large jobs with retainage or delayed payment can make a strong year look weak, or the reverse.
• Weak on long projects — progress billing and retainage don't show up until cash moves.
• Limited for growth — lenders, bonding companies, and buyers usually want accrual-based statements.

Accrual Basis: Pros and Cons for Contractors

Advantages

• Better matching of income and expenses — you see each job's true profit.
• Stronger job costing — you can evaluate performance while work is still in progress. See how to track job profitability in progress.
• Stronger financial statements — more useful to banks, bonding agents, and investors.
• Required at scale — past certain revenue thresholds, the IRS generally mandates accrual.

Disadvantages

• More complex bookkeeping — you track receivables, payables, retainage, and unbilled work.
• Tax before cash — you may owe tax on income still sitting in receivables or retainage.
• Needs stronger systems — accurate job costing and regular reconciliations become essential.

IRS Rules: When Accrual Becomes Required

The IRS lets most small businesses use the cash method. But under IRC §448(c), once your average annual gross receipts over the prior three years exceed an inflation-adjusted threshold — $32 million for tax years beginning in 2026 (Rev. Proc. 2025-32) — you generally must switch to accrual for tax purposes.

Contractors carry a second layer of rules. Under IRC §460, long-term contracts — those not completed within the tax year they start — are generally taxed on the percentage-of-completion method, which recognizes income as the job progresses. A key exception exists for smaller contractors: a construction contract expected to finish within two years, performed by a contractor under the §448(c) gross-receipts threshold, can often use a simpler method such as completed-contract. This matters most on larger projects that span more than one tax year.

Because crossing the §448(c) threshold forces a change in accounting method — which carries its own tax consequences under the §481(a) adjustment rules — it's worth reviewing your position every year rather than discovering the requirement after the fact.

Which Method Is Right for Your Business?

There's no one-size-fits-all answer, but a practical guideline:

• Cash basis tends to fit smaller contractors with short job cycles, limited retainage, and a preference for simpler books and tax deferral.
• Accrual basis tends to win once jobs get larger, longer, or more complex — especially when you need accurate job-profitability data, bank financing, or bonding.

Many growing contractors eventually move from cash to accrual as they scale. The goal is to make that change on your terms, not because an IRS threshold made it for you.

Make the Right Choice for Your Business

The cash-versus-accrual decision affects far more than your tax return — it shapes how you read profitability, manage cash flow, and plan for growth. If you're unsure which method fits, or you're approaching the point where a change may be required, contact KDM Accounting Services to schedule a conversation. We'll help you choose the method that supports both your tax strategy and your long-term goals.