InvoiceQuickly + PayPal: Accept Invoice Payments Through PayPal
Use your PayPal Business REST app credentials to create a hosted PayPal invoice link, then reconcile paid events through PayPal's verified webhook signature flow.
How it works.
Add your PayPal app credentials
Enter the Client ID, Client Secret, and webhook ID from a PayPal Business REST app. InvoiceQuickly encrypts them at rest.
Generate a PayPal link
Choose Payment Link on an unpaid invoice. InvoiceQuickly creates a PayPal invoice for the remaining balance without emailing it for you.
Clients pay via PayPal
Clients click the button, log into PayPal, and pay. They can use their PayPal balance, linked bank account, or card.
Auto-reconciliation
Payments are matched to invoices automatically. Your dashboard updates in real time.
Why connect it.
- Create a hosted PayPal invoice for the exact outstanding balance
- Verify invoice-paid events through PayPal's webhook verification API
- Match the PayPal invoice ID back to the InvoiceQuickly invoice
- Record verified payments idempotently so retries do not duplicate money
- Keep PayPal credentials encrypted at rest
Best for.
- International freelancers whose clients prefer PayPal for cross-border payments
- Small businesses offering multiple payment options to reduce friction
- Consultants working with clients who already use PayPal for business payments
Setting it up
Create a REST app in the PayPal developer dashboard and copy its Client ID and Client Secret into InvoiceQuickly payment settings. Create a webhook for invoice-paid events using the provider-specific URL shown in settings, then store its webhook ID alongside the credentials. Use PayPal sandbox credentials first. Payment links are created on demand for the invoice's remaining balance.
Best practices
Start in the PayPal sandbox
Connect sandbox credentials and a sandbox webhook ID first. Complete an invoice payment and verify that it reconciles before switching to live credentials.
Subscribe to invoice-paid events
Configure the exact provider-specific webhook URL shown in settings and subscribe to PayPal invoice-paid events.
Keep credentials together by environment
A sandbox client, secret, and webhook ID must stay together. Do not mix sandbox credentials with a live webhook ID.
Use the payment history as an audit trail
InvoiceQuickly stores the verified external payment ID and rejects duplicate webhook retries for the same PayPal event.
Common issues
Customer can't see PayPal payment option
Confirm the invoice link opens the PayPal-hosted invoice and that the PayPal account and client market support the selected currency and payment method.
PayPal shows paid but InvoiceQuickly does not
Inspect the PayPal webhook delivery and confirm its webhook ID matches the connected environment. Retry the verified invoice-paid event after correcting the configuration.
A webhook event was delivered twice
No action is required if the same external PayPal invoice ID was already recorded. InvoiceQuickly treats verified retries idempotently.
Last verified: August 2026
See what Pro includes
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Frequently Asked Questions
Is a PayPal Business account required?
Yes. Personal PayPal accounts can't receive business payments. Upgrading to Business is free on PayPal's website.
What are PayPal's fees?
PayPal sets and charges its own merchant and currency-conversion fees. Review the current fees for your account and market in PayPal.
Can I connect both Stripe and PayPal?
Yes, but each generated payment link uses one provider. Create the invoice link with the provider you want that client to use.
Other Integrations
Useful, occasional notes
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