A voucher in accounting is an internal authorization document that ties an invoice or other transaction request to the paperwork and approvals that justify paying it. It sits between receiving a bill and recording the expense in the general ledger, functioning as proof that someone with authority reviewed the transaction before money moved. Each voucher bundles the invoice, purchase order, receiving report, and sign-offs into one retrievable package, which then becomes the backbone of the audit trail and the first line of defense if a tax examiner questions a deduction.
What Goes on a Voucher
The voucher itself is a cover sheet. At minimum it carries a unique sequential number to prevent duplicates and make retrieval easy, the transaction date, the payee’s full legal name, and a description of what was purchased. The dollar amount has to match the original invoice or contract exactly, and each line item is assigned a general ledger account code so the expense lands in the right category on the financial statements.
What gives the voucher its weight is what’s attached to it. That typically includes the vendor’s invoice, the internal purchase order that initiated the buy, proof of payment such as a canceled check image or bank transfer confirmation, and the receiving report showing the goods or services actually arrived. For expense types like business travel or client entertainment, itemized receipts showing the merchant, date, individual charges, and payment method also belong in the packet. A voucher missing any of these attachments can stall a payment or leave a deduction unsupported during a tax examination.
The Main Types of Vouchers
Payment Vouchers
A payment voucher, sometimes called a disbursement voucher, documents cash leaving the organization. Every check, wire, or authorized electronic payment should have one. This is the highest-volume voucher type in most businesses, covering rent, utilities, vendor invoices, and contractor fees. It records who got paid, how much, which account absorbed the cost, and who approved it.
Receipt Vouchers
Receipt vouchers work in the opposite direction. When cash comes in from a customer payment, interest income, or another source, a receipt voucher confirms the deposit matches internal records. Without one, discrepancies between bank statements and books can go unnoticed for months.
Journal Vouchers
Journal vouchers handle transactions where no cash actually moves. Depreciation entries, accruals, reclassifications, and corrections to earlier errors all live here. To fix a mistake cleanly, an accountant creates a journal voucher that reverses the original entry with a negative amount on the same account codes, then adds a second line with the corrected posting so the voucher nets to zero. Non-cash adjustments deserve the same documentation as actual payments, because auditors scrutinize them just as closely.
Petty Cash Vouchers
Petty cash vouchers track small purchases paid from a company’s cash-on-hand fund. Every disbursement, no matter how small, should have a voucher listing the supplier, description, amount, and account code. The custodian signs each one, and a supervisor or department head co-signs. At reconciliation, the total of all petty cash vouchers plus the remaining cash must equal the original fund balance, and the reconciliation should be done by someone other than the custodian. Any shortfall needs an explanation.
How a Voucher Moves Through the System
The lifecycle starts when accounts payable compiles the voucher and attaches the supporting documents. It then goes to a department manager or authorized supervisor who confirms the purchase was budgeted, legitimately requested, and properly documented. That approver signs off physically or digitally, clearing the voucher for processing.
A core principle runs through this workflow: segregation of duties. The person who creates a voucher should not be the same person who approves payment, signs the check, or reconciles the bank account. Processing invoices should be separated from adding or modifying vendor records, generating payments, authorizing payments, and signing on the bank account. When one person controls too many of these steps, the opportunity for internal theft rises sharply. Small businesses where one person wears several hats need compensating controls, like independent monthly reviews.
After approval, accounting staff verify the account codes, amounts, and payee information, and then perform the three-way match described below. If everything aligns, the transaction is entered into the accounting system and payment is issued. If not, the voucher is flagged and routed back for investigation before any money moves. The completed voucher and every attachment then go into a secure filing system, physical or digital, indexed for quick retrieval.
Three-Way Matching
The most effective fraud control in accounts payable happens right before the voucher clears for payment. Three-way matching compares three documents: the purchase order (what you agreed to buy and at what price), the receiving report (confirmation the goods or services actually showed up), and the vendor’s invoice (what the supplier is charging). All three must align on quantity, description, and price before the payment proceeds.
This check catches the problems that would otherwise drain cash quietly. If a vendor bills for items nobody ordered, the purchase order won’t match. If the invoice covers 500 units but the warehouse received 400, the receiving report exposes the gap. If the unit price on the invoice exceeds the negotiated rate, the purchase order flags the overcharge. Without three-way matching, businesses risk paying for goods they never received, honoring duplicate invoices, or funding outright fraudulent billing.
Digital Vouchers
Most businesses now process vouchers electronically through accounting software rather than shuffling paper between desks, and federal law supports that shift. The Electronic Signatures in Global and National Commerce Act provides that a signature, contract, or record cannot be denied legal effect solely because it is in electronic form.1Office of the Law Revision Counsel. 15 U.S. Code 7001 – General Rule of Validity A digital approval on a voucher carries the same legal weight as a handwritten signature. At the state level, 49 states plus the District of Columbia have adopted the Uniform Electronic Transactions Act, which extends the same principle to internal business records including accounting and auditing documents.
The IRS also accepts electronic records in place of paper originals, but the system has to meet specific standards. Under Revenue Procedure 97-22, electronic storage must ensure accurate and complete transfers from the original documents, include an indexing system for retrieval, and maintain controls that prevent unauthorized alterations or deletions.2Internal Revenue Service. Revenue Procedure 97-22 Records need to be legible on screen and reproducible as hard copies on demand, and the system must provide a clear audit trail between the general ledger and the source documents. Scanning invoices into a shared folder doesn’t clear that bar if there’s no indexing, no access controls, and no way to prove the files haven’t been tampered with.
Vouchers and Tax Substantiation
A voucher system does double duty as a tax substantiation system. The IRS requires every taxpayer to keep records sufficient to establish tax liability, showing gross income, deductions, and credits.3Office of the Law Revision Counsel. 26 U.S. Code 6001 – Notice or Regulations Requiring Records, Statements, and Special Returns For business expenses, the IRS expects documentation identifying the payee, the amount paid, proof of payment, the date, and a description showing the expense was business-related.4Internal Revenue Service. What Kind of Records Should I Keep A well-constructed voucher with proper attachments satisfies all five elements in a single package.
Certain categories carry tighter documentation requirements. Business gifts are deductible only up to $25 per recipient per year, and you need records proving the business purpose, a description of the gift, the amount, and the date.5Internal Revenue Service. Income and Expenses Travel and entertainment expenses similarly require contemporaneous records, not reconstructions after the fact. Vouchers created at the time of the expense, with receipts attached immediately, are far more defensible than records assembled weeks later.
How long to hold onto vouchers depends on what they document. The IRS generally requires records to be kept for at least three years from the date the return was filed or two years from the date the tax was paid, whichever is later, but several situations extend that window to six or seven years, and unfiled or fraudulent returns carry no expiration at all.6Internal Revenue Service. How Long Should I Keep Records Many accountants apply a blanket seven-year retention policy to cover the longest common scenarios without having to track different destruction dates for different voucher types.
How Vouchers Are Used in Audits
During a financial audit, vouchers are the primary evidence used to verify that reported expenses are real. Auditors perform a technique called vouching, picking entries from the general ledger and tracing them backward through the voucher to the original invoice, purchase order, and receiving report. If the chain is complete, the expense is substantiated. If any link is missing, the auditor flags it as a potential misstatement or control weakness. That backward trace is the practical test of everything the voucher system is built to do: authorize, document, and preserve.