# Sibling discount calculator: price a family's registrations

Source: https://backpr.com/tools/sibling-discount-calculator. Last updated: 2026-10-11.

Free calculator at https://backpr.com/tools/sibling-discount-calculator. It runs in your browser; nothing you enter is sent to BackPR.

Set a price per child, a second-child discount and one discount for every child after that. See each child's price, the family total and how much the family saves.

### How it works
The first child pays the full price. The second child gets the second-child discount, and every child after that gets the third-child discount.

A percent discount takes a share off the price; a dollar discount takes off a fixed amount. No child's price goes below $0.

**Does BackPR apply sibling discounts automatically?**
Yes. Parents add each child and each program to one cart and check out once, and sibling discounts apply automatically if you set them up.

**Percent or dollar amount: which is better?**
A percent discount grows with the price, so it suits programs with very different prices. A dollar amount is easier for families to understand and keeps the cost to your program predictable.