Accrual vs Cash Accounting

Accrual and cash accounting answer the same question differently: when do you record a transaction? Cash accounting records revenue and expenses when money changes hands. Accrual accounting records them when they are earned or incurred, regardless of cash timing. Financial models are built on accruals because they match revenue to the effort that produced it, then the cash flow statement bridges back to actual cash.

Definition and the difference

Under cash accounting, a sale is recorded only when the customer pays, and an expense only when the bill is paid. Under accrual accounting, the sale is recorded when the good ships or the service is delivered, and the expense when it is incurred, even if cash moves later.

The two methods produce the same total over the life of a business but very different period-by-period results. The gap between them lives in working capital accounts: receivables, payables, and accruals.

Worked example in Excel

A firm delivers a 1,000 service in March but collects the cash in April. Accrual books revenue in March; cash accounting books it in April. Put accrual revenue in B2 and the change in receivables in B3.

1. March accrual revenue: 1,000 recorded in B2.
2. March receivable increase, since no cash arrived: =B2 returns 1,000 in B3.
3. March cash from this sale: =B2-B3 returns 0.
4. April collection: receivables fall by 1,000, so cash for April is =0-(-1000), or 1,000.

Cash = Accrual Revenue - Change in Receivables reconciles the two bases.

Why models use accrual

Accrual accounting matches revenue to the costs that generated it in the same period, so margins reflect economic reality rather than the timing of invoices. This is why the income statement and balance sheet are accrual based.

The cash flow statement then translates accrual profit into actual cash by adjusting for non-cash items and the change in working capital. This is the indirect method, and it is the reconciliation that ties the model together.

• Accruals match effort to reward in the right period.
• Cash flow starts from accrual net income, then adjusts.
• Working capital changes are the bridge between the two.

Nuances and mistakes

A frequent error is treating accrual profit as cash. A profitable firm can run out of cash if receivables balloon faster than collections, which is why the change in working capital matters as much as the margin.

Small businesses may report on a cash basis for tax simplicity, but any serious model uses accruals and reconciles to cash. Mixing the two within one schedule double counts or omits transactions.