Entrepreneur Income Record Book in 2026: Is It Mandatory and How to Keep Records Without Mistakes

Paper income record books stamped by the tax authorities are finally a thing of the past. However, the obligation to keep track of income has not disappeared in 2026. The government allows entrepreneurs to choose the most convenient format for maintaining records — either paper-based or electronic.

The absence of accounting records or documents supporting the figures reported in a tax return may result in penalties during a tax audit.

In this article, we will take a detailed look at how to maintain tax records correctly, efficiently, and without unnecessary bureaucracy.

What Is an Entrepreneur’s Income and Expense Record Book?

Today, the term “income record book” generally refers to any form of accounting in which an individual entrepreneur (FOP) records income for tax purposes. This may be a spreadsheet, a self-created register, or any other accounting method that allows the entrepreneur to substantiate the figures reported in a tax return.

The income record book serves as the basis for completing a tax return. Entrepreneurs enter data from primary documents, including bank statements, sales receipts, and cash register Z-reports generated by software-based cash registers (PRRO).

Single-tax payers in Groups 1–3 without VAT record only net income. Entrepreneurs operating under the general taxation system and VAT payers must additionally keep detailed records of expenses. Without such records, the tax authorities will not recognize the net profit used to calculate taxes.

Are Entrepreneurs Required to Keep Income Records in 2026?

Yes. All entrepreneurs are required to keep income records. This is a direct requirement of Article 296 of the Tax Code of Ukraine. Only the mandatory paper form has been abolished — not the obligation to account for business income.

Previously, the procedure was complex and bureaucratic. Every entrepreneur had to:

• Purchase a special record book;
• Number and bind its pages manually;
• Register the income and expense record book with the tax office;
• Obtain the signature of the head of the tax authority.

Entries were made manually every day based on daily business activity.

In 2026, the government abolished the requirement to register the income and expense record book (Article 296.1 of the Tax Code). However, Article 44.1 prohibits arbitrary preparation of tax reports. Every figure reported in a tax return must be supported by accounting records and primary documents. Failure to maintain records may lead to a tax audit.

Permitted Accounting Formats for Entrepreneurs

In 2026, entrepreneurs using the simplified taxation system have complete freedom of choice. The tax authorities accept both traditional and digital accounting methods:

• Paper format. You may purchase a regular notebook or continue using an old record book. The key requirement is to structure the pages according to your accounting needs.
• Spreadsheets. Creating a custom register in Excel or Google Sheets is fully legal.
• Taxpayer’s Electronic Cabinet. The government provides its own interface for maintaining digital records.
• Specialized online services. Accounting platforms can automatically import data from banks and software-based cash registers.

For entrepreneurs who are not VAT payers, a standard Excel spreadsheet fully satisfies legal requirements. It is convenient because formulas automatically calculate monthly or quarterly totals.

Rules for Maintaining Income Records

Entrepreneur tax accounting is based on the cash method. This means that income arises on the date when funds are actually received in a bank account or in cash. Client promises or signed completion certificates without payment are not recorded.

To maintain records correctly, it is sufficient to follow three basic rules:

1. Recording Frequency. Most single-tax payers may use monthly accounting. You simply record one total amount for each calendar month. For entrepreneurs using software-based cash registers and processing a large number of transactions, daily entries help reconcile income with Z-reports more efficiently and reduce errors.
2. Foreign Currency Revenue. If an entrepreneur receives payment in dollars or euros from a foreign client, the amount must be converted into hryvnias using the official exchange rate of the National Bank of Ukraine on the date the funds are credited (Article 292.5 of the Tax Code). Exchange-rate differences arising later when the currency is sold are not included in the record book.
3. Bank and Acquiring Fees. If a customer pays UAH 1,000 for goods, but the bank credits only UAH 980 after deducting acquiring fees, the entrepreneur must record the full amount — UAH 1,000. Reducing taxable income by the amount of bank commissions constitutes a tax violation.

What Columns Should Be Included in an Accounting Table?

Since there is no mandatory format, entrepreneurs may design the structure themselves. We recommend including the following fields in an Excel file or notebook:

• Sequential entry number;
• Transaction date (or month name for monthly accounting);
• Amount of income received (separating cash and non-cash receipts if a PRRO is used);
• Amount of refunds issued to customers.

Differences Between Accounting Under the Simplified and General Tax Systems

The main difference concerns expense accounting. Single-tax payers without VAT record only incoming revenue. Entrepreneurs operating under the general taxation system must also collect receipts, invoices, and supporting documents for every business expense.

Let`s compare the two models:

📒 Income and Expense Record Book Under the General Taxation System

Entrepreneurs operating under the general taxation system are subject to stricter requirements.

Taxes (18% personal income tax and the military levy) are calculated based on net profit — the difference between income and expenses.
For this reason, entrepreneurs must maintain records using the standard form approved by Ministry of Finance Order No. 261.

Every expense, including rent, inventory purchases, and payroll costs, must be supported by primary documents. If supporting documents are missing, the tax authorities may disallow the expense and assess additional taxes.

📊 Accounting Under the Simplified Tax System (Groups 1–3)

For single-tax payers, production and operating expenses generally do not affect taxation. The tax rate is fixed or calculated as a percentage of turnover. However, there are several nuances depending on the taxpayer group:

• Group 1. Entrepreneurs maintain records in any convenient format. Entries are made once per month. Since cash registers are not required, records are based on the entrepreneur’s own calculation of revenue.
• Group 2. Accounting is also maintained monthly. However, if you accept cash payments and use a PRRO, it is advisable to transfer Z-report data into the register daily.
• Group 3 with VAT. These entrepreneurs pay a 3% single tax plus VAT. They are not entitled to simplified accounting and must separately track expense-related transactions to monitor VAT invoices.

The Myth of Automatic Accounting: Why Bank Statements and PRRO Reports Are Not Enough

Many entrepreneurs believe that a PRRO or a bank statement completely replaces an income record book. This is a dangerous misconception. From the perspective of tax legislation, bank statements and Z-reports are primary documents. They only confirm individual transactions.

The record book or accounting table is a tax register that consolidates all these transactions into a single accounting system. During an audit, a tax inspector will request a consolidated register rather than a collection of individual receipts or extensive bank statements.

How to Correct Errors in the Income Record Book

The correction method depends on the accounting format used.

• In Electronic Spreadsheets (Excel / Google Sheets)
  You may simply edit the value in a cell. However, a safer approach is to create a separate correcting entry with a negative amount (reversal entry) and add a note.
  For example: «Correction of an error dated 12 February 2026 based on a bank statement»
• In a Paper Notebook
  Cross out the incorrect amount with a single line so that it remains readable. Write the correct figure next to it, add the date, your signature, and a note confirming the correction.

Penalties for Failure to Maintain Records

Failure to comply with tax accounting requirements may result in financial liability.
Tax authorities may apply two types of sanctions:

• Tax Penalty (Article 121 of the Tax Code). Failure to maintain accounting registers or ensure their proper storage results in a penalty of UAH 1,020. If the violation is repeated within one year, the penalty increases to UAH 2,048.
• Administrative Penalty (Article 164-1 of the Code of Administrative Offenses). Improper accounting practices may result in a warning or a fine ranging from UAH 51 to UAH 136.

Entrepreneurs should also remember the risks associated with unrecorded cash transactions when using software-based cash registers. If tax authorities establish that revenue was not properly recorded, the financial consequences may be significantly more severe.

How Long Should Accounting Records Be Retained?

Any register, electronic file, or paper record book must be retained for at least three years (1,095 days).

This period is calculated not from the date of the entry itself, but from the date of submission of the tax return that relied on those records (Article 44.3 of the Tax Code).

Accounting Automation: How Vchasno.Zvit Can Help

For entrepreneurs who do not want to maintain records manually in spreadsheets, specialized services can be a more convenient alternative.

For example, Vchasno.Zvit allows entrepreneurs to prepare tax reports, monitor filing deadlines, and work with electronic reporting within a single platform.

The system automatically collects data from primary sources, generates accurate income records, and calculates single-tax and military levy amounts according to the rules in force in 2026.

As a result, entrepreneurs can prepare and submit tax returns to the tax authorities in just a few clicks.