Xero - Why is the round off amount so large?

Scope

Round off difference in CB and Xero

Solution

While most round-offs are approximately 0.01 and are there to offset the difference in how Chargebee and Xero perform a rounding; sometimes it can be because of how Chargebee has different Pricing Models. (Reference /billing/2.0/product-catalog/plans#pricing-models)

This is best explained with an example.

• If an invoice has a tiered pricing structure where

  • 0 to 50 units; the rate is 0.0

  • 51 and above; the rate is 0.22

• The invoice has a quantity of 75. Which means,

  • The first 50 units are 0.00

  • The next 25 units are 25 * 0.22 = 5.50

• Now Xero does not have a tiered pricing structure.

• Instead, Xero has a straight rate * qty.

• When we pass the line item to Xero; we calculate the rate as follows :

  • Rate = {Line Amount}/{total quantity}

  • I.e. Rate = 5.5/75 = 0.0733333

  • I.e. Rate is approximately equal to 0.07

• So when we pass this line item to Xero; it will calculate as follows :

  • Rate = 0.07

  • Qty = 75

  • Amount = Rate * Qty = 75 * 0.07 = 5.25

• Due to the above discrepancy, we send a roundoff to make sure the totals match on both Chargebee and Xero.

• We will not be able to match each individual line item amount or tax amount because of the difference in calculation methodology between Chargebee and Xero.