How to Set Up Flexible Payment Plans on Sparkforge Invoices

By Sparkforge Support Team ·Last reviewed May 3, 2026

Sparkforge invoices support installment plans. Split any invoice into scheduled payments by percentage or amount, give each split its own due date, and customers get reminders until the full invoice is paid off.

Large-ticket invoices rarely get paid in one shot. Sparkforge lets you split a single invoice into a scheduled payment plan instead of issuing multiple invoices.

What payment plans do

  • Break one invoice into multiple installments by percentage or fixed amount.
  • Each installment carries its own due date and payment status.
  • Reminders fire on each installment's due date until that split is paid.
  • The customer can pay one installment at a time or several together. The invoice closes when the final installment clears.

How to add a payment plan

  1. Open the invoice and click Add Payment Schedule.
  2. Set each split as a percentage or fixed amount and assign a due date.
  3. Send the invoice. The customer sees the schedule attached.
  4. The customer pays a scheduled installment, or checks the box to combine multiple installments at once.

Why this exists

Partial payments give the buyer control over how much to pay and when. Payment plans give you control: you define the installment size and timing, the customer follows the schedule. Useful for service contracts, deposits plus balances, and any invoice where you want predictable cash flow.

Customizing the reminder emails

You can edit, enable, or disable the Payment Schedule Received notification. Go to Payments > Invoices & Estimates > Settings > Notifications > Customer Notifications, find Payment Schedule Received, and edit the email or SMS template.

Note: payment-schedule merge fields render empty if the invoice does not include a payment schedule.

Frequently Asked Questions

Can I split an invoice by percentage or only by dollar amount?
Both. Each installment can be defined as a percentage of the invoice total or as a fixed amount.
Do customers get reminded for each installment?
Yes. Each split has its own due date, and a reminder goes out for installments that aren't paid yet.
Can a customer pay multiple installments at once?
Yes. When paying, the customer can check additional installments to combine them into a single payment.
Can I customize the payment schedule reminder emails?
Yes. Go to Payments > Invoices & Estimates > Settings > Notifications > Customer Notifications and edit the Payment Schedule Received template.
How is this different from partial payment?
Partial payment lets the customer choose what to pay and when. Payment plans let you, the seller, define the installment amounts and dates.

Was this article helpful?