Declining balance switch and production depreciation calculator

What this calculation answers

Book depreciation can follow a declining balance or measured use rather than the same annual amount throughout life. A schedule makes the timing of those charges visible while retaining the entered residual floor.

This page supports declining balance with a permanent straight-line switch and a separate units-of-production scenario. The existing straight-line calculator remains the simpler constant-charge workflow.

The Straight line depreciation calculator with schedule gives a constant-charge schedule. This page instead switches from declining balance or allocates the base using entered production units.

Use the right input conventions

Cost and residual use one currency, and residual cannot exceed cost. Declining mode uses whole useful-life years and an entered factor divided by that life. Production mode instead uses estimated lifetime units and entered period units.

Production units cannot exceed estimated lifetime capacity in total. The useful-life and factor fields do not change production charges; they belong to the alternative declining model.

Interpret the result

At each declining-method year, the model compares the declining charge with straight-line depreciation over the remaining life. Once straight line is at least as large, it switches permanently; the last year ends at residual.

Production mode charges the depreciable base in proportion to actual entered use. It need not use the whole base within the displayed periods if some estimated lifetime production remains.

Work through the example

An asset costing one thousand with residual one hundred, five-year life and factor two starts with declining rate forty percent. First-year depreciation is four hundred, leaving book value six hundred.

The complete declining-switch schedule depreciates nine hundred and ends at one hundred. Under production mode, fifty of one hundred lifetime units instead depreciate four hundred fifty over the displayed periods.

Where the model stops

These are book-value scenarios, not jurisdiction-specific tax depreciation tables. Partial years, impairments, disposals, revised estimates and asset-component accounting are absent.

The page does not decide which method is permitted or best reflects an asset. Use the model to compare stated assumptions, then verify applicable accounting requirements separately.