> ## Documentation Index > Fetch the complete documentation index at: https://docs.spacebaseapp.com/llms.txt > Use this file to discover all available pages before exploring further. # Accounting lease modifications > Record modifications, remeasurements, terminations, impairments, abandonments, and error corrections on an approved accounting lease under ASC 842. Use accounting lease modifications to record events that change an approved accounting lease after commencement. Each modification adds a new snapshot to the lease timeline. Earlier snapshots are preserved, so the original recognition and every later remeasurement stay auditable while the amortization schedule and journal entries update from the effective date forward. ## Before you begin Identify the accounting event first, then choose the workflow. ASC 842 distinguishes between: * **A lease modification** — a change to the terms and conditions of the contract that changes the scope of or consideration for the lease (ASC 842-10-25-8), such as an amendment, expansion, extension, or reduction in space. * **A remeasurement that is not a modification** — the contract is unchanged, but an event under ASC 842-10-35-1 or ASC 842-20-35-4 requires you to remeasure the lease liability, such as exercising a renewal option that was not previously reasonably certain. * **A change in the right-of-use (ROU) asset only** — the lease liability is unchanged, but the asset is impaired or abandoned under ASC 360-10. * **An error in a prior snapshot** — the original inputs were wrong, which is a correction under ASC 250 rather than a new event. For each event, confirm the effective date, the date the change should first appear in the general ledger, and the revised payments, lease term, and discount rate. Update the lease-administration record first so the accounting wizard pre-fills the current payment obligations. The modification types offered depend on the classification of the lease, its asset class, earlier snapshots, and your company's settings. Each type's page notes when it is not available. ## Create a modification Open the accounting lease and select **Lease Actions > Create Modification**. Select the [modification type](#modification-types) that matches the event and click **Create Modification**. **Update existing accounting lease** and **Partially terminate accounting lease** open the full accounting wizard: snapshot settings, payment obligations and balances, classification, and summary. The other types open a short form for the specific event. **Add lease expiration** adds closing entries directly, and **Flow through real estate changes** opens the changelog for review. Check the new snapshot on the **Lease Timeline**, the amortization schedule, and the journal entries. Confirm the effective date, the remeasured lease liability and ROU asset, and any gain or loss, impairment, or catch-up entries. Resolve any lease-administration changes you have addressed, then submit the accounting lease for review and approval through **Lease Actions**. Only approved accounting leases flow into reports and automated journal entries. See [Accounting Leases](/accounting/leases#how-do-i-submit-my-accounting-lease-for-review). ## Modification types | Modification type | ASC 842 event | | ----------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [**Update existing accounting lease**](/accounting/modifications/update) | A modification not accounted for as a separate contract (ASC 842-10-25-9 through 25-12), or a remeasurement triggered by a lease term or option reassessment (ASC 842-20-35-4). | | [**Add lease expiration**](/accounting/modifications/expiration) | Derecognition of the fully amortized ROU asset at the end of the lease term. | | [**Partially terminate accounting lease**](/accounting/modifications/partial-termination) | A modification that decreases the scope of the lease (ASC 842-10-25-13). | | [**Terminate accounting lease**](/accounting/modifications/termination) | Early termination of the whole lease, with derecognition of the ROU asset and lease liability (ASC 842-20-40-1). | | [**Create new accounting lease**](/accounting/modifications/new-accounting-lease) | A modification accounted for as a separate contract (ASC 842-10-25-8). | | [**Correct an error**](/accounting/modifications/error-correction) | Correction of a prior-period error in the accounting inputs (ASC 250-10). | | [**Flow through real estate changes**](/accounting/modifications/flow-through) | A lease-administration change with no accounting effect, or one already reflected in a snapshot. | | [**Add impairment**](/accounting/modifications/impairment) | Impairment of the ROU asset under ASC 360-10, as required by ASC 842-20-35-9. | | [**Abandon lease**](/accounting/modifications/abandonment) | A decision to cease using the underlying asset before the end of the term, with the lease liability unchanged (ASC 360-10-35-47 and 35-48). |