Split payments: Down payments and taxes added to remaining balance

Payments + Shipping & Fulfilment
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Topic summary

A Mexican store selling home products (12,900 MXN each) needs a split payment solution with specific requirements:

Payment Structure Needed:

  • Option 1: Full payment upfront (12,900 MXN)
  • Option 2: Installment plan with:
    • Down payment: 3,500 MXN
    • Remaining balance: charged one day later, calculated as remaining amount plus 21% VAT (totaling 11,374 MXN)

Current Challenge:
The Downpay app was tested but only allows customization of the down payment, not the remaining balance calculation. The store needs an app that can apply VAT (21%) specifically to the remaining balance after the down payment, not the full product price.

Status: One respondent suggests such an app “probably” doesn’t exist. The question remains unresolved with no confirmed solution identified.

Summarized with AI on October 31. AI used: claude-sonnet-4-5-20250929.
1

Hi! We have a Shopify store that sells home products. Each product is priced at 12,900 Mexican pesos when paid in full. However, when the product is purchased in installments with interest, the customer should be able to make an initial payment of 3,500 Mexican pesos, and the remaining balance plus the VAT of 21% on that balance should be charged one day later. This means the customer would pay 3,500 MXN as a down payment, and then, sometime later, 11,374 MXN should be charged.

Both options should be offered: pay in full and pay in installments.

Is there an app that allows me to offer this kind of installment payment option? We have tried with Downpay but only the down payment can be customized, not the remaining.

2

probably not