---
title: "Correcting a subscription from a past date"
description: "Fix invoicing mistakes by changing the quantity, plan terms, custom price or discount of a subscription from a date in the past. Fenerum credits every invoice issued since that date and re-invoices the corrected values on one new invoice."
url: https://www.fenerum.com/en-DK/docs/billing/subscriptions/retroactive-changes/
updated_at: "2026-11-04T09:00:00"
---
Sometimes a subscription may have been invoiced wrongly for a while. For example, the customer added seats a month ago but
nobody updated the quantity in Fenerum. With **Correct from a date in the past** you can apply the right quantity,
plan terms, custom price or discount from the day it should have started. Fenerum then automatically credits every
invoice issued since that day and reissues the corrected amounts on a new invoice.

## How it works

When you correct a subscription from a past date, Fenerum automatically:

- **Credits every invoice issued from that date.** Each affected invoice gets its own credit note, linked to the
  original invoice. The billing period that contains the selected date is credited partially (_Partial refund_), and
  later periods are credited in full (_Full refund_).
- **Settles what is still open.** If the original invoice is still open, its credit note settles it. Amounts that a
  pending payment is already collecting are left alone.
- **Keeps credit for paid invoices on the account.** If the original invoice has already been paid, the credit stays
  on the account as account credit. If **Automatically apply credit from opened credit notes** is enabled for your
  organization (it is by default), the credit is used on the corrected invoice.
- **Issues one corrected invoice, dated today.** It charges the corrected values for every affected billing period,
  each prorated over its own full billing period.
- **Moves the MRR on the selected date.** The MRR change is recorded on the date you chose, not today, so your MRR
  reporting shows the change when it actually happened.

## Correcting a subscription

You need the **Full access to billing** permission.

1. Go to the account and click the edit icon on the subscription.
1. Make the change: update the **Quantity**, **Plan**, **Price**, **Custom price** or the discount in **Advanced
   Settings**.
1. Below the form, select **Correct from a date in the past**.
1. In **Prorate date**, choose the day the change should have applied from. The date picker only lets you pick days
   that are allowed (see [Which dates can I choose?](#which-dates-can-i-choose)).
1. Check the **Subscription Summary** before you save. It shows:

   - one entry per credit note, with the amount credited, how much of it settles the original invoice and how much
     becomes account credit;
   - the change itself, with the MRR change and the corrected invoice.
1. Click **Preview credit note** or **Preview invoice** to see the documents before they are issued.
1. Click **Save**. Fenerum automatically issues the credit notes and the new, corrected invoice right away.

**Warning: This cannot be undone**

Saving issues credit notes and a new invoice, and they are synced to your ERP system like any other invoice. Check the
Subscription Summary and the previews carefully before you save.

## Example

A customer has a monthly subscription with 5 seats that renews on the 1st of each month. On March 10 you find out
they actually went up to 7 seats on January 1.

You change the quantity to 7, select **Correct from a date in the past** and choose January 1. Fenerum then
automatically:

- credits the invoices from January 1, February 1 and March 1, one credit note per invoice;
- issues one new invoice for 7 seats for January, February and March.

The MRR change is recorded on January 1.

## Which dates can I choose?

The prorate date must be:

- in the past (yesterday at the latest);
- at most 5 years back;
- on or after the subscription's start date.

All dates are in the subscription's timezone. If no day is allowed, for example because the subscription started
today, the option is not shown.

## When is it not available?

A correction from a past date is not possible for:

- subscriptions on [backwards-charging](https://www.fenerum.com/en-DK/docs/billing/subscriptions/charging-options.md) plan terms, before or after the
  change (the option is not shown for these);
- accounts invoiced through a [reseller](https://www.fenerum.com/en-DK/docs/billing/subscriptions/reseller.md);
- accounts with a [contract](https://www.fenerum.com/en-DK/docs/billing/subscriptions/contract.md) that covers the selected date;
- changing the billing frequency.

Fenerum also rejects the correction with an error on the form if:

- the subscription was changed, reactivated or repriced after the selected date, since re-invoicing would overwrite
  that change. Choose a date after the last change instead;
- the billing periods changed after the selected date, for example because of an early renewal or a moved renewal
  date. Choose a later date;
- nothing has been invoiced for the subscription from the selected date.

---

## Navigation

Up: [Subscription management & financial insights on autopilot](https://www.fenerum.com/en-DK/index.md) › [Documentation](https://www.fenerum.com/en-DK/docs.md) › [Billing](https://www.fenerum.com/en-DK/docs/billing.md) › [Subscriptions](https://www.fenerum.com/en-DK/docs/billing/subscriptions.md)

Full site index: https://www.fenerum.com/llms.txt