ANAF e-Invoice for Fitness Studios: Complete 2026 Guide

E-invoicing is an important topic for businesses in Romania. If you run a fitness, Pilates, yoga or wellness studio, it is worth knowing what e-Invoice means for you and how integration with an invoicing program can reduce manual work.

This guide explains what e-Invoice is, how it integrates with booking software, and which mistakes to avoid.

What Is e-Invoice and Why Does It Matter for Your Studio?

e-Invoice (electronic invoice) is a system developed by ANAF through which invoices are electronically transmitted in structured XML format. It's not a PDF sent via email — e-Invoice is a standardized digital document that is validated and stored by ANAF.

If e-Invoice applies to you, an issued invoice must go through the ANAF platform. Manually, the process involves: creating the invoice, XML conversion, uploading to the ANAF platform, waiting for validation, sending the PDF to the client. With the right integration, invoices for NexiBook payments are issued through SmartBill or Oblio.

Legal Requirements for Fitness Studios in the EU

Whether e-Invoice applies depends on your company's tax situation. Confirm with your accountant:

• B2B (business-to-business): if you sell corporate packages to companies, e-Invoice may be relevant for those invoices. Confirm with your accountant.
• B2C (business-to-consumer): for sales to individuals, check the current rules with your accountant.
• Micro-enterprises and sole proprietors: rules may differ by legal form. Confirm with your accountant.

How NexiBook Integrates SmartBill and Oblio

NexiBook integrates with two Romanian invoicing programs: SmartBill and Oblio. e-Invoice is done through them.

The Automated Flow

1. Client books and pays online (Stripe or Netopia) on your studio page
2. NexiBook detects the confirmed payment and automatically sends data to SmartBill/Oblio
3. SmartBill/Oblio issues the invoice, and e-Invoice is done through the invoicing provider
4. The PDF invoice is automatically sent to the client via email
5. You see the invoices in your SmartBill/Oblio account

Result: invoices for NexiBook payments are issued through SmartBill or Oblio.

Step-by-Step Setup: SmartBill with NexiBook

Step 1: Create SmartBill Account

If you don't have an account yet, create one at smartbill.ro (check the provider's site for pricing). Add your company details (tax ID, address, invoice series) and activate the ANAF e-Invoice module.

Step 2: Generate API Key

In SmartBill settings you will find the access details for the integration (email, token, company tax ID). You will enter them in NexiBook.

Step 3: Configure Integration in NexiBook

In the NexiBook administrator account, in the invoicing settings, select SmartBill, enter the access details and configure: invoice series, default product/service (e.g. «Pilates Class», «10-class Package»), VAT rate and unit of measure.

Step 4: Test

Make a test payment and check that the invoice appears in SmartBill. Check the details: client name, amount, service description, VAT. The process is similar for Oblio, with Oblio's access details.

Common Mistakes to Avoid

1. Postponing adoption — If e-Invoice applies to you, don't leave it for the last moment. Check with your accountant in advance.
2. Manual invoicing — If you issue invoices manually, you repeat the same work for every transaction. Integration with an invoicing program reduces it.
3. Incomplete invoice data — Make sure every invoice contains: tax ID, complete address, correct service description, applicable VAT rate. Invoices rejected by ANAF need to be redone.
4. Not correlating with accounting records — Make sure invoices from SmartBill/Oblio sync with your accountant's records. Check monthly reconciliation.
5. Using booking software without e-Invoice integration — If your booking platform doesn't integrate with SmartBill or Oblio, you'll double the work: once in booking, once in invoicing. Choose software that does everything in one place.

SmartBill or Oblio?

NexiBook integrates with both. The choice depends on what you already use: ask the accountant you work with and check each provider's pricing and terms on its site. See also the complete automation guide.

Frequently Asked Questions

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