The bank statement: the most underrated primary document in your company

What a bank statement is and what it shows

A bank statement is a document your bank issues for your company account, listing every movement on it over a chosen period: a day, a week, a month, or a custom range you pick in online banking. Unlike an invoice or a receipt, which each cover one transaction, the statement covers everything at once.

• Incoming payments: client payments, transfers from co-founders, refunds from suppliers.
• Outgoing payments: to suppliers, rent, payroll, social security contributions, taxes.
• Fees and charges: monthly account maintenance fees, transfer fees, card fees.
• Interest: any interest credited on the current account, if the bank pays it.

Every line in the statement carries a value date, an amount, a direction (debit or credit), a payment reference if one was entered, and counterparty details as far as the bank displays them. The statement typically opens and closes with a balance for the period, so the running total always has to check out.

For a company with no cash register and few cash payments, the bank statement is, in practice, the main record of everything that happened to the business's money.

Why it counts as a primary document, and how your accountant uses it

A primary accounting document records a business transaction at the moment it happens, with enough detail to be booked: date, amount, parties, reference. A bank statement meets that definition for every single payment on the account, which is why Bulgarian accounting law treats it on the same footing as an invoice, a protocol, or a receipt for bookkeeping purposes.

• Recording: every incoming or outgoing amount on the statement triggers a bookkeeping entry, revenue, expense, or the settlement of a receivable or payable.
• Reconciliation: at the end of each period your accountant checks the balance in the accounting records against the balance on the bank statement. A mismatch means a missed entry, a manual error, or a bank fee waiting to be booked.
• Matching: every line on the statement needs a paired document, an invoice for a payment to a supplier, a protocol for a refund, a contract or order for an incoming client payment. Without that pairing, the accountant cannot classify the movement correctly.

This is exactly where a bit of discipline from the owner pays off: if money lands in the account with no clear reference and no matching invoice on the other side, your accountant will ask before booking it. Sending the statement together with the underlying documents on a regular basis avoids that back-and-forth right before a filing deadline.

Bank statement vs. payment order: what is actually different

The two get confused often, because they show up at the same moment, when you make a payment. The difference matters for bookkeeping, though.

• A payment order (in Bulgarian, платежно нареждане) is your instruction to the bank: an amount, the recipient's IBAN, a payment reference, and the date you want the transfer executed. It expresses intent, submitted by you before execution happens.
• A bank statement is proof that the bank actually carried out that instruction: it shows the amount that left the account, on the actual date, in the amount actually transferred.
• A payment order can fail to execute, insufficient funds, a wrong IBAN, or the bank declining it. In that case, no corresponding line ever appears on the statement.

During an NRA audit or a dispute with a counterparty, the payment order shows what you requested, but only the statement proves what actually happened. That is why an accountant always treats the statement as the primary document, and the payment order as supporting context that explains the reference behind the transfer.

Why every business payment should run through the bank

A cash payment is hard to trace after the fact: there is no automatic record from an independent third party, and the receipt is easy to lose or never gets issued at all. A bank transfer, by contrast, creates a record immediately, with a date, an amount, and both parties, confirmed by the bank itself, not just by you.

• Audit trail: every payment through the account leaves a record that neither you nor the counterparty can quietly backdate. That is exactly what an auditor or an NRA inspector looks for during a check.
• Easier reconciliation: your accountant reconstructs the company's cash flow directly from the statement, instead of relying on your memory or a pile of scattered receipts.
• Fewer gaps: a payment made through the bank automatically shows up on the statement, so it cannot go unrecorded, unlike a cash payment nobody issued a document for.

The practical rule is simple: use cash only for small, day-to-day expenses. Anything above a reasonable amount, rent, suppliers, payroll, taxes, should go through the company's bank account. That is not bureaucratic caution, it is the cheapest insurance you can buy against awkward questions during a check.

PDF statements and how long you need to keep them

Almost nobody picks up a paper statement at a branch anymore. You download it from online banking as a PDF, or it lands in your inbox automatically every month. For bookkeeping purposes that is a fully valid document: the bank is the issuer, and the digital format does not weaken its evidentiary value with NRA.

• Download and archive statements systematically, by account and by month, instead of counting on the bank keeping your full history available in online banking indefinitely.
• Name each file clearly when you download it, account and period, so you can find it fast when your accountant asks for a specific month.
• Store statements alongside the invoices and protocols they relate to, so reconciliation goes faster every single time.

Bulgarian accounting law treats bank statements as part of a company's primary accounting documents and accounting records, and the general retention rule for that category is 10 years from the end of the year they relate to. Do not rely solely on the bank's own archive: download and keep your own copy on a regular basis.

The bank statement is just one link in the chain

The bank statement works hand in hand with the invoice, the protocol, and the tax return: only together do they give your accountant and NRA the full picture of the company's finances.

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