Billing for European SaaS
Billing built for European SaaS.
Keep your payment provider. Kontier handles subscriptions, usage, VAT, E-Rechnung, SEPA and accounting workflows.
14 days free · from €199/month · card required to start
Diagram: your product sends usage and subscription events to Kontier. Kontier turns them into an XRechnung invoice with net, VAT and gross amounts, collects by SEPA and exports to DATEV.
The problem
Billing starts simple.
Your billing stack shouldn't grow with the complexity.
Most SaaS teams eventually build an internal billing system without intending to. Pricing logic lives in application code. Usage lives somewhere else. Stripe handles payment. Tax rules sit in another service. Invoices require another workflow. Accounting requires exports and manual reconciliation. Kontier replaces that glue.
Billing that starts as €49 per user gradually accumulates API-call pricing, annual plans, credits, discounts, proration, EU VAT, reverse charge, XRechnung, failed-payment handling and DATEV export.
The architecture
Your team owns your product, not the wiring between nine systems.
Before Kontier
- 01 Application
- 02 Custom billing code
- 03 Usage database
- 04 Pricing logic
- 05 Tax service
- 06 Invoice generator
- 07 Payment provider
- 08 Dunning
- 09 Accounting export
Your team owns every connection.
With Kontier
- Application
- Kontier
- Payment + Accounting
Your team owns your product.
European-native
Built around European billing realities.
VAT
EU VAT logic, reverse charge and B2B taxation workflows.
E-Rechnung
Structured electronic invoicing, including XRechnung and ZUGFeRD.
SEPA
European bank payment workflows for recurring collection.
Accounting
Structured handoff into accounting, including DATEV-oriented workflows.
Multi-country billing
One billing architecture for European expansion, not one per market.
Auditability
Billing events and calculations stay traceable, end to end.
Keep your payment provider
You don't have to replace your payments.
Kontier is the billing layer, not another payment silo. Keep the payment infrastructure that already works for you and let Kontier orchestrate the complexity above it.
Live today: StripeGoCardless
E-invoicing mandate
E-invoicing becomes law. Your billing should already speak it.
The dates are statute, not roadmap (Wachstumschancengesetz, § 14 UStG). Most global billing tools still don't issue a structured EN 16931 invoice - Kontier does, natively, and the accounting handoff to your Steuerberater comes out of the same system.
- Since Jan 1, 2025 Receiving Every German business must be able to receive structured e-invoices.
- Jan 1, 2027Next deadline Issuing Mandatory for B2B invoices from businesses above €800k prior-year revenue.
- Jan 1, 2028 Everyone Transition periods end - structured e-invoices for all domestic B2B.
GET /v1/e-invoicing/documents/{id}/findings → BR-DE-15 Check the deadlines at the German Federal Ministry of Finance ↗ Developer experience
Your product tells Kontier what happened.
One event in. Meter, pricing rule, tax and invoice happen without another line of billing code.
$ curl -X POST https://api.kontier.eu/v1/usage-events \ -H "Authorization: Bearer sk_live_…" \ -d { "customer_id": "cust_8f2k", "metric_key": "api_calls", "quantity": 18402 }→ 202 · usage.reported
Plus subscription_id, product_id and an idempotency_key so retries never double-count.
Pricing
Billing infrastructure from €199/month.
Much cheaper than maintaining billing infrastructure internally.
Choose a plan first · card required to start · from €199/month net · cancel anytime
Stop maintaining billing infrastructure.
Build your product. Let Kontier handle the revenue machinery.
Choose a plan first. Card required to start the trial. No setup fee. Cancel anytime.