The best invoicing software for freelancers and sole traders (2026)
How freelancers and sole traders can issue invoices, e-invoices and fiscal receipts without the hassle — which features matter, what to watch out for, and why Tezga eKasa is built for service businesses.
The short answer: for freelancers and sole traders in service industries, the best invoicing software is the one that issues a regular invoice, an e-invoice via SEF and, when needed, a fiscal receipt — all in one place, in your language and by local rules. Generic foreign invoice tools do not understand SEF, VAT labels or fiscalization in Serbia.
What good invoicing software must have
- Invoices and proformas in a couple of clicks, with your logo and details
- e-invoices via SEF (outgoing and incoming) — required for work with companies and the state
- A fiscal receipt when you charge consumers for a service (retail trade)
- Templates and recurring invoices, so you do not retype the same thing each month
- An overview of who paid and who is late, with reminders
- Everything in your language and by local rules, with live support
Excel, a foreign tool, or a local register
| Criterion | Excel / by hand | Foreign tool | Tezga eKasa |
|---|---|---|---|
| e-invoice (SEF) | ✗ | ✗ | ✓ |
| Fiscal receipt | ✗ | ✗ | ✓ |
| Local language + rules | ✗ | partial | ✓ |
| Price for a freelancer | free, but manual | often expensive | from €9 a month |
| Support in your language | ✗ | ✗ | ✓ |
Excel is free, but you do everything by hand and have no e-invoice or fiscal receipt. Foreign tools do not know SEF, VAT labels or fiscalization. So for service businesses, a local tool that has it all built in makes the most sense — like Tezga eKasa.
Why Tezga eKasa for freelancers and sole traders
Tezga eKasa is built for service businesses — freelancers, sole traders, agencies and companies. You issue an invoice, an e-invoice and a fiscal receipt from the same tool, and receipts archive themselves in Fascikla. It runs on a phone, tablet or computer, from €9 a month. For online sales it also connects to WooCommerce, Shopify and Magento.
Key takeaways
- For service businesses, the best choice is a local tool with e-invoice and fiscal receipt in one
- Excel has no SEF or fiscalization; foreign tools do not know local rules
- Tezga eKasa: invoice + e-invoice + fiscal receipt, from €9 a month
Frequently asked questions
If you work with companies or the state (B2B/B2G), yes — an e-invoice via SEF is mandatory. For charging consumers you issue a fiscal receipt. Tezga eKasa does both.
No. A software tool runs on a phone or computer you already have, from €9 a month, with no device to buy.
Yes — templates and recurring invoices mean you do not retype the same thing each month.
What you get with Tezga eKasa
- Invoice, e-invoice and fiscal receipt in one
- Templates and recurring invoices
- SEF flow (outgoing and incoming)
- From €9 a month, on a device you have
Read more
e-Invoicing in Serbia 2026: who must comply, deadlines, and how → The KPO book for flat-rate entrepreneurs: what it is, the 6M limit, how to keep it → Fiscalization for freelancers and service businesses: what you actually need →Try Tezga eKasa free
Fiscal receipts and e-invoices for service businesses — a register that keeps it simple.