Why did a BigCommerce order total change after it was placed?

The BigCommerce help pages give 3 common reasons. The first to rule out: Editing an order can make BigCommerce recalculate its subtotal and total, so an order's amount can change after the day it was placed.

Money · Is money moving the way it should?

Is it broken, or just quiet?

A number can fall because fewer people came, or because something stopped counting them. Below are the causes the BigCommerce help pages give, and how to check each one yourself.

What causes it?

  1. Editing an order can make BigCommerce recalculate its subtotal and total, so an order's amount can change after the day it was placed.

    In the BigCommerce help: Order subtotal and total calculate automatically; edits to the following properties trigger a recalculation. Orders Overview | BigCommerce Docs, read 2026-11-12.

  2. An app or developer can set an order's prices or totals to fixed values, so a total can change without anyone editing it in the store.

    In the BigCommerce help: You can override calculated values such as product prices, subtotals, and totals by sending a fixed value in the request. Orders Overview | BigCommerce Docs, read 2026-11-12.

  3. A discount can be added to an order after checkout, as BigCommerce's docs describe, which lowers its total.

    In the BigCommerce help: To add a manual discount, overwrite the product price or discount_amount. Orders Overview | BigCommerce Docs, read 2026-11-12.

How do I check it myself?

  1. If an app or developer sets order totals by hand, check that the subtotal and total were both set, since one is not worked out from the other.

    In the BigCommerce help: If you override subtotal or total, override both; the system will not re-calculate the other. Orders Overview | BigCommerce Docs, read 2026-11-12.

  2. If prices with and without tax are set by hand, check that both were set, since otherwise the order total can be wrong.

    In the BigCommerce help: If you override price_ex_tax or price_inc_tax, override both; otherwise, order totals will not calculate correctly. Orders Overview | BigCommerce Docs, read 2026-11-12.

How does BigCommerce work with Feder?

  • Connect BigCommerce to Feder and it joins your Money apps.
  • When you connect BigCommerce, Feder checks the connection straight away and shows Connected only when that check passes. If a reading cannot be taken later, Feder shows it as not read, never as zero.

Some numbers are too quiet to judge daily, such as a form filled in a few times a week. Until there is enough of your own history to judge a change, Feder says it is still learning and scores nothing, rather than guessing.

See whether you can trust the numbers in BigCommerce, one of your Money apps. Feder only reads. It never changes anything in BigCommerce.

Where do these answers come from?

Every cause and check on this page comes from the BigCommerce help pages, quoted above with the date we read them. Last reviewed 2026-11-12. We read them again by 2027-11-12. If one changes, this page changes or comes down.

Know the day a number breaks, not the month after.