Issuing an invoice is much more than just a piece of paper in exchange for our money. It is the business card of our company, the basis of our accounting and the most common form of communication with the NAV. That's why it's essential to handle it confidently and properly from the very first moment. In this post we'll show you how.
Why do we pay special attention to billing?
In our work, we see that start-up entrepreneurs often make the mistake of thinking of invoicing as a quick administrative task. But getting invoicing right is vital for three reasons:
Guarantee of payment: the partner or customer will only pay on the basis of an invoice that is correct in form and content. An incorrectly issued document can cause delays, disputes and inconvenience.
The basis of accounting: our work, the accuracy of our accounting, depends on the invoices we receive. Processing an incorrect document requires extra work and reconciliation, which slows down the accounting process.
The key to NAV compliance: this is the key. Through NAV Online Invoice, the authority has almost instant access to all invoices issued. An error, omission or failure to provide data can easily lead to an audit and a fine.
Mandatory elements of a correct invoice
For an invoice to be a valid official document, the VAT law specifies exactly what information it must contain. Let's take a look at the most important ones:
Invoice serial number: Unique, sequentially numbered identifier.
Date of invoice: the date on which the invoice is issued.
Your (Seller's) details: name, address and tax number.
Buyer's details: name, address and, if a taxable person, tax number.
Delivery date: The date on which the product or service was delivered. This is a critical date because of the date of payment of VAT!
Payment deadline: the date by which the buyer must pay the invoice.
The exact name of the product/service: a clear description that identifies the transaction.
Quantity and unit of measurement: e.g. 3 hours, 5 pieces, 1 kg.
Net unit price: the price per unit or per hour, excluding VAT.
Net value, VAT rate, VAT value, Gross total: VAT-round traders must indicate precisely the tax rate applied (e.g. 27%) and the amount of tax in HUF.
Exemption marking: If you are exempt (AAM) or KATA, you must indicate the appropriate reference on the invoice (e.g. „Exempt” or „Small taxpayer”).
Common mistakes to avoid
Based on our experience, we have collected the most common pitfalls to watch out for:
Missing customer data: the customer's tax number is often missing, without which the invoice is not formally correct. Always ask for it in advance!
Wrong date of payment: many people write the date of the invoice, although the two do not always coincide. Many invoices are often not always correct.
Incorrect VAT treatment: sometimes a VAT-exempt entrepreneur inadvertently issues a VAT invoice or applies the wrong tax rate to a VAT-paid invoice. This can cause serious tax problems.
Manual invoicing: although still legal, manual invoicing is the biggest source of errors. It is easy to misspell and the mandatory NAV reporting has to be done manually within 24 hours, which many people forget.
What to do if you have already made a mistake?
The solution is to issue a correcting or cancelling invoice to correct the incorrect document in accordance with the rules.
The most effective solution: Online billing programs
Without exception, we recommend that our clients use a professional online invoicing software (e.g. Billingo, Számlázz.hu) from the very beginning. Why?
Eliminates errors: Programs will not allow you to save the invoice without filling in the required information.
Automatic NAV connection: The issued invoice is immediately and automatically forwarded to the NAV, so the reporting obligation is fulfilled.
Professionalism: It gives a single, clear account image, which increases confidence in your business.
Comfort: It can be accessed from anywhere and made easily accessible to the accountant, which speeds up joint work.
Accurate and regular invoicing is one of the hallmarks of a successful business. It shows financial discipline and professionalism, which is essential for long-term growth. Pay attention and use reliable tools to facilitate the process.
If you are unsure about invoicing or have special circumstances (for example, you are invoicing to a foreign partner or are affected by reverse VAT rules), please contact us. We'll help you get your finances in order from day one.