| Comparison | Cash basis | Accrual basis |
|---|---|---|
| Revenue recorded | When you receive payment | When you earn it (regardless of payment) |
| Expense recorded | When you pay | When you incur it (regardless of payment) |
| Reflects business reality | Distorted timing for service businesses | True picture of profitability |
| Required by GAAP | No | Yes |
| Tax filing | Allowed under ~$32M (2026 IRS threshold) | Required above ~$32M |
| Best for | Sole proprietors, small services | SaaS, multi-month contracts, growing businesses |
| Investor / lender expectation | Acceptable for very small | Standard once revenue exceeds $1M |
The core difference
Cash basis is simple: when cash arrives, record it as revenue. When cash leaves, record it as expense. No worry about invoicing timing, no deferrals, no accruals. For a solo consultant who bills and collects in the same month, cash basis works fine and matches how they naturally think about the business.
Accrual basis records transactions when the economic event occurs. Revenue is recognized when earned, regardless of when cash is collected. Expenses are recognized when incurred, regardless of when paid. This produces financials that better reflect the business activity of each period, but requires more work.
The practical difference shows up in timing. A consultant who invoices $10K in December but collects in January shows $10K revenue in December under accrual, $10K in January under cash. Over a full year, the totals are similar. Month by month, the two methods can show very different pictures.
When cash basis is fine
Cash basis works for businesses with minimal timing mismatches. Sole proprietors who get paid at time of service. Retailers where payment is immediate. Small service businesses with short AR cycles. The IRS allows cash basis for most businesses under approximately $32M in average annual gross receipts (the 2026 threshold), so tax preparation is simpler.
Cash basis also has tax-planning advantages. You can accelerate expenses or delay income near year-end to manage taxable income. Prepay January expenses in December. Delay final invoices to January. These timing moves affect cash-basis taxable income but not accrual.
The simplicity matters for small businesses without a finance team. Cash basis books can be maintained by the owner with a bookkeeper checking monthly. Accrual basis books require someone who understands accruals, prepaids, and deferrals - which is typically a more expensive skill set.
When accrual becomes necessary
The first trigger is usually raising capital. Venture investors want accrual financials. Banks providing credit facilities want accrual financials. Any buyer doing due diligence wants accrual financials. Cash-basis books in front of sophisticated parties look like a business that has not matured financially.
The second trigger is when timing differences become meaningful. A SaaS company with annual prepaid contracts has revenue collected far ahead of when it is earned. A service business with 60-day payment terms has revenue earned well before cash arrives. In these cases, cash basis misleadingly shows revenue in the wrong months.
The third trigger is GAAP requirements. Companies with average annual gross receipts above approximately $32M (the 2026 IRS threshold) generally must use accrual for tax purposes. Public companies are required to be accrual. Any company approaching either threshold should switch proactively rather than being forced into it during a stressful transition.
Making the switch
The conversion involves setting up AR balances, AP balances, deferred revenue, prepaid expenses, and any accruals at the conversion date. This is a one-time project that typically takes 20-40 hours of accountant time depending on complexity. The cleaner your cash-basis books, the faster the conversion goes.
After conversion, the monthly close requires accrual-specific work: recognizing revenue on deferred contracts, accruing expenses that have been incurred but not paid, amortizing prepaids. These add 3-5 hours per month to the close process, but produce meaningful improvements in financial accuracy.
Maintain both cash and accrual views if helpful. Many businesses report internally on accrual for management purposes but file taxes on cash basis if the IRS allows. This requires keeping both sets of books reconciled, which adds complexity, but lets you optimize for both management decisions and tax outcomes.