How to Handle Accounting as a Self-Employed Person in 2025 - A Complete Guide

Managing your accounting as an OSVČ doesn't have to be a nightmare. In this comprehensive guide, we'll walk you through everything you need to know for 2025 — what options you have and how to avoid the most common mistakes that can cost you thousands of CZK.

Flat-Rate Tax vs. Tax Records — Which One Works Better for You?

As an OSVČ in 2025, you have two main options for handling your taxes and accounting:

Flat-Rate Tax — Who Is It Right For?

The flat-rate tax is an ideal choice for OSVČ with annual income up to 2 million CZK. The following rates apply in 2025:

• Basic rate: 6,208 CZK per month (covers income tax, social security and health insurance)
• Higher rate (income between 1–2 million CZK): 16,000 CZK per month

Advantages of the flat-rate tax:

• Minimal admin — no tax records required
• Predictable costs — you pay the same amount every month
• Time savings — no need to archive documents for tax purposes
• Simple to set up — just submit an application by 10 January

Disadvantages:

• You cannot claim most tax credits (except the basic one)
• Income is capped at 2 million CZK
• You cannot be a VAT payer

Tax Records — The Traditional Approach

Tax records are the traditional way of managing accounting for OSVČ. They are mandatory for anyone who doesn't meet the conditions for the flat-rate tax.

What you need to track:

• Income and expenses
• Assets and liabilities
• Employee wages (if applicable)
• VAT (if you are a VAT payer)

Documents You Must Archive

Regardless of which regime you choose, certain documents must be kept on file:

Under the flat-rate tax, archive:

• Issued invoices (in case of an income audit)
• Service contracts and purchase orders
• Bank statements

Under tax records, also archive:

• Received invoices
• Income and expense receipts
• Mileage log (if claiming vehicle expenses)
• Employee payroll records
• Fixed asset inventory cards

Retention period: 5 years from the end of the tax period

10 Most Common Accounting Mistakes Made by OSVČ

1. Mixing Personal and Business Finances

Mistake: Paying business expenses from a personal account and vice versa. Solution: Keep strictly separate accounts and payment cards.

2. Late VAT Registration

Mistake: Exceeding the 2 million CZK threshold without registering for VAT. Fine: Up to 500,000 CZK Solution: Monitor your income regularly and register in time.

3. Incorrect Advance Payment Calculations

Mistake: Paying low advances and ending up with a large top-up payment at year end. Solution: Calculate advances based on your current income, not last year's figures.

4. Forgetting About Minimum Insurance Contributions

Minimum monthly payments in 2025:

• Social security: 4,103 CZK
• Health insurance: 2,968 CZK

5. Not Keeping a Mileage Log

Mistake: Claiming vehicle expenses without a mileage log. Solution: Keep an electronic mileage log on an ongoing basis.

6. Misclassifying Expenses

Example: A laptop costing 40,000 CZK is not an expense — it's an asset that must be depreciated.

7. Forgetting to Claim Depreciation

Mistake: Not claiming depreciation = paying more tax than necessary. Solution: Set up a depreciation schedule at the start of the year.

8. Invalid Tax Documents

Mistake: Accepting an invoice that is missing required details. Solution: Always check for company registration number, VAT number, date and VAT rate.

9. Late Tax Return Submission

Deadline: 1 April (2 May if filed via data mailbox) Fine: 500 – 300,000 CZK

10. Not Claiming All Available Tax Credits

Commonly overlooked:

• Basic taxpayer credit: 30,840 CZK
• Child tax credit: 15,204 – 29,904 CZK
• Student credit: 4,020 CZK

How DokladBot Solves These Problems

DokladBot is an accounting assistant that lives right inside your WhatsApp and:

✨ Automates Your Record-Keeping

• Photograph a document = it's automatically logged
• Data recognition powered by AI
• Connects directly to your bank

📱 Works Anywhere

• No app installation needed
• Access from your phone or computer
• Share with your accountant in a single click

💰 Saves You Time and Money

• 5 minutes a day instead of hours of paperwork
• 199 CZK per month (less than a daily coffee)
• First week free

🎯 Keeps Track of Important Deadlines

• Reminders for advance payment due dates
• Alerts when you're approaching the VAT threshold
• Document validity checks

Conclusion: Accounting Doesn't Have to Be Painful

Accounting for OSVČ in 2025 offers more options than ever before. Whether you go with the flat-rate tax or traditional tax records, the key to success comes down to three things:

1. Consistency — spend a few minutes on your accounting every day
2. A clear system — have a defined process for logging documents
3. The right tools — make use of modern solutions like DokladBot

Remember: good accounting doesn't just save you money on taxes — it saves you time and stress. And every minute you're not buried in paperwork is a minute you can spend on your work or your family.

Frequently Asked Questions

Do I need an accountant if I use DokladBot? No, DokladBot is designed so you can manage it yourself. But if you'd prefer to work with an accountant, you can easily share your data with them.

What happens if I exceed the flat-rate tax income limit during the year? You have 15 days to deregister and switch to tax records.

Can I change my flat-rate expense percentage during the year? No, the flat-rate expense percentage applies for the entire year and cannot be changed mid-year.