Payments

InvoiceQuickly + Mollie: Accept European Invoice Payments

European clients expect local payment methods — iDEAL in the Netherlands, Bancontact in Belgium, SOFORT in Germany. Mollie integration brings 20+ European payment methods to your invoices, so clients pay the way they prefer.

How It Works

1

Create a Mollie account

Sign up for Mollie (no monthly fees, pay-per-transaction) and connect to InvoiceQuickly.

2

Select your payment methods

Choose which payment methods to offer — iDEAL, Bancontact, SOFORT, cards, SEPA, Klarna, and more.

3

Invoice with local payment options

Invoices automatically display the payment methods available to each client based on their country.

4

Collect and reconcile

Payments clear quickly (iDEAL is instant, SEPA in 1-2 days) and reconcile automatically in your dashboard.

Key Benefits

  • 20+ European payment methods including iDEAL, Bancontact, SOFORT, Klarna
  • No monthly fees — pay only per transaction
  • Automatic country-based payment method display
  • Fast settlement (next business day for most methods)
  • Particularly strong for Netherlands, Belgium, Germany, and Nordic markets

Best For

  • European B2B businesses invoicing clients across the EU
  • Dutch businesses where iDEAL is the dominant payment method
  • Agencies billing European clients who prefer local bank transfers over cards

Setting it up

Setup takes 5-15 minutes depending on whether you have an existing Mollie account. Prerequisites: active Mollie account with admin access, your InvoiceQuickly workspace, and the relevant API permissions or OAuth authorization. From Settings → Integrations → Mollie, follow the connection flow (OAuth for most, API key for some specialized tools). The integration syncs bidirectionally where supported — invoice creation in one system reflects in the other. Initial setup includes mapping data fields between systems (customers, products, payment methods, tax codes).

Best practices

Define one source of truth for customer data

When you connect Mollie, decide which system owns customer records. Most teams keep their primary CRM/ERP as the source of truth and let invoices sync into it. This prevents duplicate customer creation and reconciliation issues.

Test with a small batch before production rollout

Before syncing all historical data or going live for daily operations, test with 5-10 invoices to verify field mapping, tax handling, and payment workflow. Adjust configuration based on test results.

Reconcile sync status weekly

Network failures, OAuth expirations, and edge cases occasionally cause sync gaps. A weekly reconciliation (compare invoice counts in both systems) catches issues early before they accumulate.

Document the integration scope for your team

Write a brief internal doc (one page) covering: which workflows use the Mollie integration, who owns reconciliation, what to do when sync fails. Reduces support overhead as the team grows.

Common issues

Sync stops after working initially

Most common cause: OAuth token expired (typically 60-100 days depending on the Mollie platform). Reconnect via Settings → Integrations → Mollie. Set a reminder to refresh authorization every 60 days for critical integrations.

Field mapping creates duplicate or missing data

During initial setup, the field mapping between Mollie and InvoiceQuickly may not catch every edge case. Adjust mapping in Settings → Integrations → Mollie → Field Mapping. Re-sync affected records after fixing.

Rate-limit errors during high-volume operations

Mollie APIs typically allow 100-1000 calls per minute. Bulk operations (importing all customers, syncing 1000+ historical invoices) can hit rate limits. InvoiceQuickly handles backoff automatically; if you see persistent errors, retry during off-peak hours.

Last verified: April 2026

See How Much You Could Save

Use our ROI calculator to see exactly how much invoice automation could save your business each year.

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Frequently Asked Questions

What are Mollie's fees?

Mollie charges per transaction with no monthly fees. iDEAL is €0.29 per transaction, credit cards are 1.8% + €0.25. See Mollie's pricing page for current rates.

Does Mollie work outside Europe?

Mollie primarily serves European payment methods. For global coverage, combine Mollie with Stripe or PayPal integration.

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Mollie Invoice Payments (EU) — InvoiceQuickly | InvoiceQuickly