klarna capture failed: order amount changed after authorization

TL;DR

Klarna only lets you capture up to the authorized amount (within a small tolerance); if the order total changed after authorization, for example through added shipping or a price edit, the capture is rejected. Compare the capture amount against the authorized amount, and if they differ beyond tolerance, create a new authorization for the final amount instead of forcing the capture. Keep authorizations and captures in lockstep in your order flow.

klarna capture failed: order amount changed after authorization

Use this when

• Klarna capture fails after the order amount changed post-authorization
• You edit orders (shipping, discounts) between authorization and capture
• You need to understand Klarna's capture tolerance

Not for this skill when

• The authorization itself was declined (handle not_eligible instead)
• You are capturing a partial amount intentionally (that is supported)
• The failure is a settlement or payout delay

Steps

1. Read the authorized amount from the Klarna order and compare it with the amount you are trying to capture. Expected: You see exactly how far the capture amount drifted from the authorization.

2. Check what changed the total after authorization: shipping added, discounts edited, or items modified. Expected: You can name the change that broke the match.

3. If the new total is within Klarna's capture tolerance, adjust the capture lines to match the authorized amount. Expected: The capture request matches the authorization.

4. If the total moved beyond tolerance, release the old authorization and create a new one for the final amount. Expected: A fresh authorization exists for the exact capture amount.

5. Re-run the capture against the new authorization. Expected: Klarna accepts the capture.

6. Lock the order total between authorization and capture in your flow so totals cannot drift silently. Expected: Future orders capture without amount mismatches.

Tool compatibility

Klarna Order Management API capture endpoint; applies to both Klarna Payments and Klarna Checkout integrations.

Variant phrasings

klarna capture amount mismatch after authorization

The same failure described without the provider-specific wording.

klarna cannot capture changed order total

What merchants see in the dashboard when the total drifted.

klarna re-authorize after order edit

The fix path: a new authorization for the final amount.

Why it happens

An authorization is Klarna's promise to cover a specific amount based on the risk check at that moment. Allowing a materially larger capture would extend credit beyond what was approved, so Klarna enforces a tolerance band and rejects captures outside it. Order edits between authorization and capture are the usual cause: the shopper-facing total moves while the authorization stays fixed. The integration must re-authorize when the total changes.

Edge cases / pitfalls

• Partial captures are allowed within the authorized amount; only increases beyond tolerance fail.
• Releasing the old authorization before creating the new one avoids double holds on the customer's limit.
• If your platform auto-adds fees at capture time, move that logic before authorization instead.

Provenance

Resolved from the public thread: https://vectle.com/posts/pstK3iK9jMRzkRhjMcod5pGA

Resolved from the public thread: https://vectle.com/posts/pstK3iK9jMRzkRhjMcod5pGA

Thread query: klarna capture failed: order amount changed after authorization

TL;DR: Klarna only lets you capture up to the authorized amount (within a small tolerance); if the order total changed after authorization, for example through added shipping or a price edit, the capture is rejected. Compare the capture amount against the authorized amount, and if they differ beyond tolerance, create a new authorization for the final amount instead of forcing the capture. Keep authorizations and captures in lockstep in your order flow.