Buy Now, Pay Later in Calendars: Klarna and Affirm Setup

By Sparkforge Support Team ·Last reviewed May 3, 2026

Buy Now, Pay Later in Sparkforge Calendars lets eligible customers pay for appointments in installments through Klarna or Affirm via Stripe. Enable the methods in your Stripe payment settings and they appear in the booking widget.

Buy Now, Pay Later in Calendars lets you offer installment payments at booking checkout. When supported through Stripe, eligible customers see Klarna or Affirm in the booking widget and complete the appointment with flexible payment terms.

How it works

Customers choose an installment-based payment method during calendar checkout instead of paying only by card. This reduces upfront friction and can lift conversion on higher-ticket appointments.

Eligible customers may see:

  • Klarna
  • Affirm

Available options depend on the booking flow, customer location, and Stripe eligibility rules.

Why offer it

  • Flexible checkout: more ways to pay during booking.
  • Higher booking conversion potential on bigger-ticket appointments.
  • Modern payment experience directly in the booking widget.
  • Stripe-managed availability based on configuration, location, and eligibility.

Supported payment methods

Klarna and Affirm are available in Calendars through Stripe payment-method settings. Availability depends on customer region, eligibility, and the methods you have enabled for the relevant product area.

How to enable Klarna and Affirm in Calendars

  1. Open Payments.
  2. Go to Settings.
  3. Open Integrations.
  4. Click Manage Stripe.
  5. Review payment methods available for the relevant product area.
  6. Enable Klarna and Affirm where supported.
  7. Save your changes.
  8. Open the calendar booking widget and test the checkout experience.

How Klarna and Affirm appear during booking

Eligible options show on the booking widget at checkout. Customers select an option, complete the required payment steps, and continue with the appointment. Available options are dynamic, so not every customer sees the same methods.

When customers see these options

Customers see Klarna or Affirm only when all conditions are met:

  • Stripe is connected to your account.
  • Klarna or Affirm is enabled for the applicable payment area.
  • The customer's location is supported.
  • The customer meets provider eligibility requirements.

FAQ

Will every customer see both Klarna and Affirm at checkout?

No. Available options are shown dynamically based on supported location, provider rules, and customer eligibility.

Do I need Stripe to use Klarna and Affirm in Calendars?

Yes. Setup is tied to Stripe payment-method management.

Can I still accept card payments in the booking widget?

Yes. Card payments remain available alongside other enabled payment methods.

Frequently Asked Questions

Will every customer see both Klarna and Affirm at checkout?
No. Available options are shown dynamically based on supported location, provider rules, and customer eligibility.
Do I need Stripe to use Klarna and Affirm in Calendars?
Yes. Setup is tied to Stripe payment-method management inside Sparkforge.
Can I still accept card payments in the booking widget?
Yes. Card payments remain available alongside other enabled payment methods.
Does this apply to all calendars?
It applies to supported calendar booking flows where payments are enabled and the payment methods are configured correctly.
Can high-ticket service appointments use Buy Now, Pay Later?
Yes. Klarna and Affirm are most useful on higher-ticket appointments where customers want to spread payments rather than pay upfront.

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