Cash or Accrual Accounting: The Real Difference and How to Choose

Whether to run cash or accrual accounting looks like a technical bookkeeping question. In practice it determines whether the number you call profit means anything at all. This article covers the difference with a worked example, what Iranian law requires, and the practical route from cash to accrual.

The difference in one sentence

On the cash basis, a transaction is recorded when money moves. On the accrual basis, it is recorded when it happens — revenue at delivery or performance, cost when incurred, regardless of payment date.

Take a single month. A credit sale of 100 collected two months later; 30 collected on last year's sales; salaries of 20 for the month paid the following month; and 12 paid for a year of rent covering next year.

Both figures are arithmetically correct, but only one describes the month. The 18 is a statement about liquidity, not profitability.

Why accrual became the standard

Matching. Costs incurred to earn a period's revenue must be recognised in that period, otherwise profit is not comparable across periods.

Visibility of obligations. On the cash basis, a supplier balance or a customer receivable never appears at all — there is effectively no balance sheet showing the real position.

Resistance to manipulation. On the cash basis, deferring one payment by a week moves profit between periods. Accrual accounting narrows that freedom considerably.

Iranian accounting standards are written on this basis, and period-end adjustments are its substance.

What Iranian rules require

For legal entities the position is clear: statutory journal and general ledger, with financial statements on an accrual basis. Sealing and record-keeping obligations apply from the first day of the fiscal year.

For individual business owners, the executive regulation under Article 95 of the direct taxation law divides taxpayers into three groups with different record-keeping duties:

Classification depends on turnover and activity type, and the rial thresholds are revised periodically — check the current tax authority circular for the applicable figures. Very small taxpayers may also use the Article 100 note route, which simplifies these duties substantially.

The hybrid basis

Many small businesses operate between the two: sales, purchases and payroll on an accrual basis, with minor items such as utilities and consumables recorded when paid. This is defensible on two conditions — the policy is written down and it is applied consistently. Changing basis from year to year destroys comparability and is difficult to explain on audit.

Which basis fits you

In project work such as contracting, the cash basis is effectively meaningless: costs are incurred months before certificates are paid, so a cash report shows a profitable project as a loss-maker.

The hidden cost of staying on cash

• Mispricing: without costs in the right period, true unit cost is unknown and margins are illusory.
• Bad distribution decisions: a strong cash month may simply be deferred payments.
• Weak bank negotiations: lenders want accrual statements and will not credit-assess from a cash report.
• Blindness to receivables: without accruals, no debtor listing with due dates is ever produced.

Migrating, step by step

1. Pick the transition date, ideally the start of a fiscal year.
2. Schedule receivables and confirm balances with customers.
3. Schedule liabilities: suppliers, accrued payroll, tax and social security payable.
4. Count inventory and establish unit cost.
5. Inventory fixed assets with in-service dates and compute accumulated depreciation.
6. Post the opening entry with these balances, taking the difference to equity.
7. Rewrite the routine policies: the revenue recognition boundary, expense timing and monthly adjustments — see accrual revenue recognition.
8. Keep the cash view in the form of a cash flow statement so you see both profit and money.

Three mistakes after the switch

Recording advances as revenue. Money received before delivery is a liability; treating it as revenue overstates profit and creates a hole in the next period.

Skipping monthly adjustments. Accrual accounting without accruals for incurred unpaid costs and without prepayment allocation is just cash accounting in different clothing. The full checklist is in year-end closing.

Confusing profit with liquidity. After the switch, book profit rises while the bank balance does not. That is expected — management needs to watch both numbers side by side.

Key takeaways

• Cash accounting speaks about money, accrual about performance; decisions need both.
• Legal entities and group-one taxpayers are effectively required to use accrual; it is not a free choice.
• Recording sales on collection creates mismatches with VAT and portal filings and invites audit.
• A hybrid basis is acceptable only if it is documented and applied consistently.
• Start a migration at the beginning of a fiscal year with receivables, payables, inventory and fixed assets.