offering payment plans (not suscriptions)

• pay in full with Stripe or PayPal
• pay in installments aka payment plans (for bigger coaching packages)
•  

As you know, Squarespace supports subscriptions, but it doesn't support payment plans and hasn't announced any plans to do so.

If you need payment plans now, you're better off with Shopify because it offers integrations with popular pay-later services like Klarna, AfterPay, Zip and Sezzle. They have also announced that their own "Buy Now, Pay Later" feature will be launched later this year. This will allow clients to give their customers the option to split their payments into four equal installments, with no interest or additional fees.

If you're interested trying Shopify (Buy Buttons) with Squarespace, I wrote a guide that explains this.

Update February 2021: Squarespace added Afterpay as an option in the US, Australia and New Zealand. PayPal Pay-in-3 is available in the UK.

Update December 2021: Squarespace added Clearpay in the UK. Clearpay is the brand name of Afterpay in the United Kingdom.

I really hope Squarespace releases the payment plan/ buy now pay later feature. I sent them a note via the contact form.

Hoping for an integration within the next few months *fingers crossed*

This would be HUGE for service products. I'm a photographer and web designer. I could utilize the service products for different packages, and the forms for contracts. I typically have my clients put 20% down at time of signing and the remaining balance due at completion. 

I could ditch my other apps I currently use for this. 

Afterpay is nice but it's only for physical products. I'd love to see a payment plan option in Commerce or at least Members Areas.