The best all-round pick for most small businesses is renn: free for up to 25 invoices per month, Verifactu-certified, and it comes with real accountants who proactively flag what you're leaving on the table. This list is for autonomos and small business owners who need billing software that handles Spanish tax requirements without the overhead. We evaluated each tool on Verifactu compliance, pricing, ease of use, and whether it includes a real accountant. Last updated May 2026.
We looked at six criteria: Verifactu compliance (mandatory for autonomos from July 2026), pricing transparency, Spanish tax integration (models 303, 349, IRPF 130), ease of use for non-accountants, accountant access (included vs. optional vs. none), and real user reviews from Trustpilot and G2 as of May 2026.
We excluded tools with no Spanish tax compliance and tools that require a dedicated IT setup. Every tool on this list works without an accountant, though some come with one.
renn is a gestoria with a platform built on top of it. You get billing software, but what makes it different is that real accountants watch your numbers and flag what you're missing. You don't wait for your gestor to ask, they come to you.
Pricing: Free up to 25 invoices/month. Paid plans from 15 EUR/month.
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Best for: Autonomos billing under 100k EUR/year who want their accountant to tell them what they're missing, not just file their taxes.
Quipu has been one of the go-to platforms for Spanish self-employed since 2012. It covers invoicing, expense tracking, bank sync, and tax models. The optional gestoria add-on connects you to an accountant within the same platform.
Pricing: From 12 EUR/month for invoicing only. Up to 60 EUR/month for the full plan with bank sync and gestoria add-on.
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Best for: Small businesses with mixed expenses and invoices who want one platform that scales with them.
Holded is closer to a lightweight ERP than a billing tool. It handles invoicing, inventory, CRM, projects, and accounting in one place. Overkill for a solo autonomo, but the right fit once you have a small team.
Pricing: From 7.50 EUR/month for a basic plan. Standard plans for small businesses start around 29 EUR/month.
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Best for: Pymes with 2-10 people who want one tool as the business grows and need inventory alongside invoicing.
Xolo targets freelancers operating across Europe. It includes a dedicated accountant as part of every plan, not as an upsell. Spanish tax handling, VAT across borders, and bank integration are all covered.
Pricing: From 75 EUR/month, accountant support included.
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Best for: Expat freelancers and digital nomads with international clients who need one platform that handles multi-country compliance.
Cuentica has been built for the Spanish self-employed market from day one. Every feature maps to something a Spanish autonomo actually needs: model 303, model 130, IRPF, annual summaries. No fluff.
Pricing: From 9.90 EUR/month with no usage caps.
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Best for: Autonomos who want a no-frills Spanish tax tool at a fair flat price.
Contasimple (by Cegid) covers billing, stock management, and basic accounting in one tool. Verifactu-certified and updated for 2026 compliance. A solid option if you sell physical goods alongside services.
Pricing: From 12 EUR/month.
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Best for: Small businesses that sell physical products and need stock management alongside billing without paying for a full ERP.
Start with compliance. From 1 July 2026, autonomos must use Verifactu-certified software. Every tool on this list is certified. Before choosing any tool not on this list, verify the certification directly with the provider.
Decide if you want an accountant included. renn and Xolo include one. The others don't. If you want proactive tax advice rather than just a filing tool, that distinction matters more than price.
Match the tool to your complexity. Solo autonomo with service clients: renn or Cuentica. Small team with mixed products and services: Quipu or Holded. Selling physical goods: Contasimple or Holded. Cross-border freelancer: Xolo.
Watch what happens at scale. Holded and Quipu both let you add modules as you grow. renn is focused on the autonomo segment and does not try to become an ERP. Choosing the right ceiling now saves a platform switch later.
Price the real cost. A tool at 9.90 EUR/month with no accountant is not cheaper than a 15 EUR/month tool that includes one, if you're paying a gestor 50 to 100 EUR/month separately. Run the real math before choosing on headline price alone.
Is billing software mandatory for autonomos in 2026?
Verifactu-certified software becomes mandatory for autonomos from 1 July 2026. After that date, you cannot legally issue invoices from non-certified tools.
What does Verifactu mean exactly?
Verifactu is the AEAT's certified invoicing system. It requires your software to attach a QR code and a tamper-proof hash to every invoice, and optionally send a copy to the Tax Agency in real time. See our full guide: what is Verifactu and when is it mandatory.
Can I use free billing software and stay compliant?
Yes. renn offers a free tier that is Verifactu-certified. For a full comparison of free options, see our guide to free billing software.
Do I need an accountant if I use billing software?
The software handles invoicing and tax forms. An accountant adds proactive advice: what deductions you're missing, what your real tax liability looks like before quarterly deadlines, and what changes in your situation mean for your tax position. renn includes both in the same service.
What is the difference between billing software and accounting software?
Billing software creates and sends invoices and tracks what you're owed. Accounting software connects those invoices to your bank, categorizes expenses, and produces the tax models your gestor or Hacienda needs. Many tools in this list do both. For a deeper look, see our guide to accounting software for self-employed.
Which billing software is easiest for a new autonomo?
renn and Cuentica have the shortest learning curve. renn is designed so you can send your first invoice in under five minutes without reading any documentation.
Most billing software gives you a tool. renn gives you a tool and a team.
The free plan covers the basics: Verifactu-certified invoices, expense tracking, and quarterly tax calculations. The paid plans add proactive accountants who flag missed deductions and available benefits without waiting to be asked.
The honest limitation: renn is not the right fit if you need full inventory management, multi-currency billing, or a team of ten managing the same account. For those cases, Holded or Quipu are better choices.
If you are an autonomo or small business owner who wants your accountant to tell you what you're missing, not just file your taxes, get started with renn for free.
