Accrual principle
Expenses and income belong to the year they relate to in substance — not the year of payment.
More terms under Bookkeeping and retention: Accrued liabilities Annual accounts Association accounting Balance sheet Balance sheet total Book value Break-even point Business assets Business expenses Cash book Cash flow statement Cash receipts Contribution margin Cost centre Current assets Debit and credit Depreciation Double-entry bookkeeping Duty to keep accounts EBIT EBITDA Equity Equity ratio Financial year Fixed assets Fixed costs Foreign currency General ledger Gross profit Hidden reserves Income statement Inventory count Journal Journal entry Liabilities Liquidity Loss carry-forward Membership dues Net profit Opening balance sheet Overheads Pass-through item Prepaid expenses Provision Record-keeping ordinance Reserves Retained profit Simple accounts Swiss SME chart of accounts Tamper resistance Turnover Value adjustment Variable costs Volunteer-run structure Voucher Year-end closing modules