With Lago, you can now preview invoices even if the customer doesn’t exist yet or for an active subscription, allowing you to generate dry-run invoices or estimate potential bills.

By using the /invoices/preview endpoint, you can generate a preview of an invoice for a potential purchase or to estimate the dry-run invoice of an active subscription. This preview calculates the total invoice amount, itemizes each charge, and applies any relevant taxes or discounts. By creating a preview, you can share the projected payment details without generating or finalizing an invoice.

Docs: https://getlago.com/docs/guide/invoicing/previews