How accounting actually works: from receipts to reports

Accounting looks like a black box: receipts go in, reports come out. Inside, it is one four-step loop, repeated every month. Understanding it — even if you outsource all of it — changes how you read everything your accountant sends you.

Why the loop exists at all

Start with the problem accounting solves. A founder says "we're very profitable — invest in us." The investor's answer is always the same: "prove it — startups pitch big dreams." Information asymmetry is the gap between what insiders know and what outsiders can verify. Investors and lenders manage their risk through your numbers; managers steer by them. The standards, the Companies Act's reporting requirements, the audit regime — all of it exists to make your claims verifiable. It's more than compliance: the rules protect stakeholders, including you.

The four steps

1. Source documents. Every entry starts as evidence — a supplier invoice, a customer invoice, a contract, a bank statement. The work here is review: understand what the document represents and verify it against internal records (does the invoice match the purchase order?). Weak source documents make everything downstream guesswork, which is why record keeping is a statutory obligation and not an administrative preference.

2. Accounting treatment. Transactions are recorded in the ledger according to accounting standards — classified between assets, liabilities, equity, income and expenses, on the accrual basis. Most entries are mechanical; a minority need judgement (is this repair or improvement? revenue now or deferred?), and those are where standards and experience matter.

3. Reconcile. Ledger balances are compared against external records — bank statements above all, also supplier statements. Every difference must be explained. This is the quality-control step: unrecorded transactions, duplicates, timing errors and fraud all surface in reconciliation first. An unreconciled ledger is an unaudited claim; a reconciled one is evidence.

4. Report. The same ledger feeds several outputs with different audiences:

• Management accounts — internal profit and loss, monthly, for decisions: monitoring financial health, spotting problems, benchmarking, budgeting;
• Statutory financial statements — annual, under s201 of the Companies Act, primarily protecting shareholders and lenders;
• Tax filings — the computation for IRAS, plus GST returns if registered.

One process, one ledger, many reports — which is why sloppy bookkeeping cannot be repaired at reporting time; the reports can only be as good as the loop that feeds them.

What this means for a founder

Read your management accounts monthly and ask questions about anything surprising — that habit alone catches most problems early. Insist reconciliations are actually done, not skipped, whoever does your books. And when your accountant asks for "supporting documents," recognise the request for what it is: step 1 of the machine that turns your claims into something an investor, a bank or IRAS will believe.