Books of Accounts: What the BIR Requires and How to Register Them

Why the BIR Requires Books of Accounts

Every person or entity doing business in the Philippines — whether a single proprietor, a professional, a partnership, or a corporation — is required under Section 232 of the National Internal Revenue Code (NIRC) to keep books of accounts that record daily business transactions. These books are the primary source documents the Bureau of Internal Revenue (BIR) uses to check that the income, expenses, and taxes you report in your returns actually match what happened in your business. They are also what an examiner will ask for first in the event of a tax audit (a Letter of Authority).

Books of accounts are separate from your Certificate of Registration (BIR Form 2303) and from your official receipts and invoices, but the three work together: your invoices and receipts generate the transactions, your books record and summarize them, and your tax returns are supposed to be derived from your books. A business that issues receipts but keeps no books, or keeps books that do not reconcile with its filed returns, is exposed to assessment and penalties even if the correct tax was eventually paid.

Types of Books of Accounts

The BIR recognizes three formats, and you choose one based on your volume of transactions and whether you use accounting software:

• Manual books — bound columnar notebooks (journal and ledger) purchased from a bookstore, with pages registered and stamped by your Revenue District Office (RDO) before use. This is the most common format for small sole proprietors and freelancers.
• Loose-leaf books — computer-generated pages (e.g., printed from a spreadsheet) that are later bound and submitted to the RDO within 15 days after the close of the taxable year, together with a sworn certification. This requires an approved Permit to Use loose-leaf books before you start.
• Computerized Accounting System (CAS) — a full electronic bookkeeping and invoicing system. Since Revenue Memorandum Circular No. 5-2021, most CAS applicants no longer need a Permit to Use before going live; the BIR now generally accepts an application with post-evaluation, and simplified "CAS-lite" registration is available for straightforward systems. A cloud platform such as Kontabler falls under this category once your books and receipts are generated electronically.

Smaller, non-VAT businesses with simple cash transactions are typically required to maintain only two manual books — the General Journal and General Ledger. VAT-registered businesses and those with higher transaction volume are usually asked to maintain a fuller set of four to six books: General Journal, General Ledger, Cash Receipts Journal, Cash Disbursements Journal, Sales Journal, and Purchase Journal. Your RDO will indicate the required set on your Certificate of Registration or upon application.

What Gets Recorded Where

Each book has a distinct role:

• Cash Receipts Journal — every peso that comes in: cash sales, collections from customers, and other cash inflows.
• Cash Disbursements Journal — every peso that goes out: supplier payments, rent, utilities, salaries, and other cash expenses.
• Sales Journal — sales transactions, particularly those on credit, referencing the official receipt or invoice number.
• Purchase Journal — purchases of goods or services on credit, referencing the supplier's invoice.
• General Journal — adjusting entries, correcting entries, and any transaction that is not cash-based (e.g., depreciation, accruals, write-offs).
• General Ledger — the summarized, posted balance of every account (cash, receivables, payables, sales, expenses), pulled together from the journals above. This is what feeds your financial statements.

Consider a small retailer with monthly gross sales of ₱200,000, all VAT-registered. A ₱15,000 cash sale on a given day is entered in the Cash Receipts Journal on the date received, with the official receipt number as reference; it is also reflected as a credit to the Sales account and eventually posted to the General Ledger. If the same retailer buys ₱40,000 worth of inventory on 30-day credit terms, that purchase is entered in the Purchase Journal on the invoice date, and the corresponding payment — when it is actually paid weeks later — is entered in the Cash Disbursements Journal on the payment date, not the invoice date. Keeping the timing right matters, since BIR examiners cross-check the dates in your books against the dates on your official receipts and invoices.

In Kontabler, every sales invoice and expense you record is posted to the correct book automatically — a cash sale flows into your Cash Receipts Journal and General Ledger the moment you issue the invoice, so you are not manually recopying entries into a columnar notebook at month-end.

How to Register or Renew Your Books

For a brand-new business, books of accounts are registered together with your initial BIR registration (Form 1901 for sole proprietors and professionals, Form 1903 for corporations and partnerships), at the same time you secure your Certificate of Registration. You bring the blank notebooks (for manual books) to your RDO, and the pages are stamped and registered before you record your first transaction.

An important change under the Ease of Paying Taxes (EOPT) Act, implemented through Revenue Regulations No. 7-2024, is that manual books of accounts are now registered only once — you no longer need to bring them back to the RDO every year for annual stamping. You simply continue using the same registered and bound set until its pages are fully consumed, at which point you register a new set using BIR Form 1905. The EOPT Act also removed the ₱500 Annual Registration Fee (previously paid via BIR Form 0605 every January 31), so business registration maintenance costs are lower than before.

If you switch to loose-leaf books, you need approval from your RDO before use, and the bound loose-leaf books — together with a notarized certification — must be submitted within 15 days after the close of the taxable year. If you move to a computerized accounting system such as Kontabler, you file an application with your RDO describing the system, and in most cases you may use it upon application without waiting for a formal Permit to Use, subject to the BIR's post-evaluation.

Businesses whose gross quarterly sales, earnings, receipts, or output exceed ₱3,000,000 are additionally required to have their books of accounts audited and their financial statements certified by an independent Certified Public Accountant, and to file the CPA-certified financial statements with their annual income tax return. This ₱3,000,000 figure is the same threshold used for mandatory VAT registration, so most VAT-registered businesses fall under this audit requirement.

Penalties and Recordkeeping Duty

Failing to register books of accounts, failing to keep them, or keeping incomplete or falsified books exposes a taxpayer to compromise penalties and, in more serious cases, criminal liability under the NIRC for failure to keep records or for deliberate underdeclaration. Compromise penalty amounts vary by the size of the violation and the taxpayer's gross sales or net worth, and these schedules are revised from time to time, so the exact peso amount should always be confirmed against the current BIR compromise penalty table rather than assumed from an old figure.

Books of accounts, once registered, must be preserved intact and unaltered — an examiner who finds unexplained erasures, blank pages inserted after stamping, or entries that do not match your issued receipts can treat this as a badge of fraud, which carries a much heavier surcharge and interest exposure than an honest late filing.

Late filing or late payment of the related tax returns themselves is penalized separately — generally a 25% surcharge on the tax due, plus interest currently set at 12% per annum, on top of any compromise penalty for the late filing itself. These rates, along with the VAT threshold and the annual registration fee status, are the figures most likely to be adjusted by future legislation or BIR issuance, so business owners and bookkeepers should reconfirm them on the BIR website or with their RDO at the start of each filing year rather than relying on figures from a prior year.

Ultimately, books of accounts are not a formality to satisfy once at registration — they are the working record that should be updated as transactions happen, reconciled against your receipts and bank statements monthly, and kept ready for the day an examiner asks to see them.