Financial due diligence
How to Verify Business Revenue Before You Buy
A practical reconciliation workflow for comparing POS and invoice records with merchant statements, bank deposits, tax filings and financial statements before buying a business.
9 minute read · Updated August 29, 2026
Begin with the system where each sale is recorded
Map every important revenue stream before testing totals. A restaurant may use in-store POS, delivery platforms, catering invoices, event deposits and gift cards; a service business may rely on bookings, invoices and recurring accounts.
Export comparable monthly reports and note refunds, discounts, tips, taxes and timing differences. A headline sales number can be misleading when sources use different definitions or reporting periods.
- POS or invoicing-system reports
- Online ordering and delivery statements
- Merchant-processor settlements
- Cash-sales controls and deposit logs
- Gift-card, deposit and deferred-revenue records
Trace recorded sales through settlement and the bank
Compare card sales with merchant settlements after fees and timing differences, then trace settlements and cash deposits to the bank. Investigate unexplained gaps, duplicate deposits, unusual manual entries or large changes near the sale process.
The objective is not to make every source equal on the same day. It is to understand and document a repeatable reconciliation from recorded activity to cash received.
Compare operating records with tax and financial reporting
Review GST, PST and income-tax records as applicable, together with financial statements and general-ledger detail. Ask the seller and accountant to explain differences in reporting basis, fiscal periods, sales taxes, tips, returns or intercompany activity.
Test several periods rather than selecting only one strong month. Seasonality, price changes, closures, delivery-platform growth and one-time events can affect the pattern a buyer may inherit.
Translate verified revenue into sustainable earnings
Revenue is only the first step. Review gross margin, labour, occupancy, delivery commissions, repairs, marketing and owner compensation to understand the cash flow available under realistic buyer assumptions.
Document unresolved differences and let your accountant advise on their significance. Seller-reported figures on a listing are not a substitute for source records, and historical performance does not guarantee future results.
Common questions
Frequently asked questions
Is a POS report enough to verify sales?
No single source is conclusive. POS reports should be compared with merchant settlements, bank deposits, tax records, financial statements and other revenue systems.
How should cash sales be reviewed?
Review cash controls, daily close reports, deposit records and consistency with tax and financial reporting. Ask a qualified accountant to design the appropriate tests.
What if delivery-platform sales do not match bank deposits?
Settlement timing, commissions, refunds, promotions and withheld amounts can create differences. Reconcile gross platform sales to net settlements and then to the bank.
Official resources
Confirm current licensing, tax, zoning or regulatory requirements directly with the responsible authority.