Updated: May 2026. Most aut�nomos still type invoices in Word and export to PDF. That workflow wastes time, invites errors, and will become non-compliant when VeriFactu certified software becomes mandatory for aut�nomos on 1 July 2027. This guide compares the best free invoicing apps available in Spain, explains what to check before committing, and shows how to send a compliant invoice in under ten minutes.
Quick answer
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Best free app overall: renn Free Plan - up to 25 invoices per month, unlimited clients, VeriFactu-compliant, IRPF and IVA options included.
Do free apps handle VAT and IRPF? The good ones do. Check that the template shows tax base, rate, and total separately and supports 21%, 10%, and 4% IVA.
When does VeriFactu apply? Companies from 1 July 2026. Aut�nomos from 1 July 2027 (Royal Decree 15/2025). Look for "VeriFactu-ready" or a published roadmap from the provider.
How free invoicing apps work
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Free invoicing apps run in the cloud. You sign in, add your logo and tax data once, and the software generates a legal PDF each time you hit send. Providers monetise through invoice caps, paid bank feeds, or a cut on card payments.
Limits to check before you commit:
Invoice caps: 10 to 25 per month is typical on free tiers.
Client caps: some plans allow only five customers before forcing an upgrade.
Watermarks or ads: visible on PDFs sent to clients.
Export restrictions: full CSV or XML export may sit behind a paywall when you want to switch tools.
GDPR note: Spanish data protection rules require that your data be protected by appropriate safeguards whether servers are EU-based or covered by Standard Contractual Clauses. Request a data-processing agreement before migrating your client list.
Key features to check in a free invoice app
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Spanish-compliant template: NIF or CIF fields, sequential invoice numbering, IVA and IRPF lines, legal footer.
VeriFactu-ready: signed XML export or an official published roadmap with a date.
Multi-language support: Spanish, English, and Catalan for cross-border clients.
Mobile app with offline drafts: useful when billing on the go without a connection.
Receipt capture: snap expense tickets and link them to the correct quarter.
Payment links: embedded Stripe or PayPal to reduce late payments.
Basic reports: quarterly VAT summary and CSV export compatible with Modelo 303.
Comparison of top free invoice apps
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renn
Free for up to 25 invoices per month, unlimited clients.
VeriFactu-compliant invoices generated in a few clicks.
IRPF withholding and all IVA rates included.
Designed for non-accountants; faster onboarding than full ERPs.
Upgrade path includes quarterly Modelo 303 and 130 filing. Start free at renn.
SumUp Facturas (formerly Debitoor)
Free plan allows 4 invoices per month.
Spanish template and IVA compliant.
Already VeriFactu-compatible.
Card payments via SumUp terminal at 2.9% + ?0.15.
FacturaDirecta
Unlimited invoices for up to 10 clients or products on the free tier.
Spanish taxes built in; VeriFactu-ready today.
Web-only; charges ?5 per user to export data.
Invoice Ninja
Unlimited invoices for up to 5 clients.
Spanish tax fields available via community add-on (manual setup).
No VeriFactu roadmap announced as of May 2026.
Free PDFs carry a "Powered by Invoice Ninja" footer.
Zoho Invoice
Free forever for up to 1,000 invoices per year and 3 users.
Spanish taxes handled through custom fields.
No announced VeriFactu plan.
Zoho branding removed only on paid plans.
Billdu
No permanent free tier - 30-day full-feature trial only.
Paid plans start at ?4.99/month; Lite plan has a 10-client cap.
No public VeriFactu timeline; free trial PDFs carry a watermark.
Debitoor
Brand merged into SumUp in 2022. New sign-ups redirect to SumUp Facturas.
Payment-gateway markups: some apps add 0.5% on top of Stripe fees.
Brand-removal fees: removing the provider logo can cost ?2 per invoice.
Data export fees: full CSV export may sit behind a ?10+ paywall.
Phone support: usually paid-tier only - expect email-only delays on free plans.
Read the pricing page in full before migrating your client list to any tool.
Free vs. paid: when to upgrade
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Free apps work well when you are starting out or testing a business idea. They stop working when:
You hit the monthly invoice cap mid-month and cash flow freezes.
Client-facing watermarks or ads undermine your professional image.
You need bank feeds, Modelo 303 filing, or payroll - none of which are included on free tiers.
You need phone support and email-only response times cause delays with AEAT deadlines.
Most apps offer upgrade tiers at ?8 to ?15 per month with unlimited invoices and basic bank feeds. If you send more than 30 invoices per month or manage payroll, a full accounting platform like Holded or Quipu may recover its cost through saved hours and avoided fines. Full comparison at online accounting platform.
How to choose the right app for your situation
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Three questions narrow the field:
Monthly invoice volume: under 10 per month means almost any free tier works; over 20 means you need renn or FacturaDirecta.
VAT filing needs: if you file Modelo 303 yourself, choose an app that exports a compatible CSV or handles the filing directly.
Growth speed: pick a tool with clear, affordable upgrade tiers so you never have to migrate mid-year.
Three quick examples:
Graphic designer, 6 invoices/month, values custom PDF design: Billdu for its PDF customisation, accepting the 30-day trial to test.
Consultant, 15 invoices/quarter, files Modelo 303: renn for the CSV export and direct filing integration.
Marketplace seller, high invoice volume, Stripe integration needed: Zoho Invoice for bulk invoicing and payment links.
How to create your first invoice
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Sign up with your email and verify your DNI or NIE.
Add your business details: logo, trade name, NIF or CIF, and address.
Create the client: enter the client NIF or CIF - the app validates the format.
Add line items and select the correct IVA rate from the dropdown (21%, 10%, or 4%).
Set the IRPF withholding rate (7% for your first three years registered; 15% after).
Preview the totals and legal footer before sending.
Send via email. The app attaches the PDF and XML automatically.
When does it apply? Companies must use certified software from 1 July 2026. Aut�nomos must comply from 1 July 2027 (Royal Decree 15/2025). There is no revenue threshold - the obligation applies to all aut�nomos regardless of turnover.
What changes in practice? Each invoice will include a cryptographic hash and a QR code generated by the software. The hash prevents edits after issuance. To correct a mistake, you issue a factura rectificativa - not an edited copy of the original.
What happens if you use non-compliant software? Using software that allows post-issuance edits (double-use software) carries a fine of ?50,000 per year or ?1,000 per device under RD 15/2025.
Where is the official rule? Article 29.2.j of the Ley General Tributaria, implemented by Royal Decree 15/2025. Full detail at VeriFactu guide.
Bottom line
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The best free invoicing app is the one that stays free long enough for your business to grow, keeps you inside Spanish tax rules, and offers a clear path to VeriFactu compliance. renn's Free Plan hits those points today with 25 invoices per month, full IRPF and IVA support, and VeriFactu readiness already built in. Whichever tool you choose, verify it appears on AEAT's certified list before 1 July 2027. For aut�nomo registration and ongoing quarterly filing, renn handles setup and compliance from one platform.
