Profitability / Free financial tools

Book Depreciation Calculator

Create a full-year straight-line or declining-balance book depreciation schedule.

USD • Planning model · Instant results · No sign-up

Enable JavaScript to use this interactive calculator. The calculation method and assumptions are explained below.

How this calculator works

Straight-line depreciation spreads cost less residual value over useful life. Declining balance applies the chosen rate to opening book value, capped so value does not fall below residual.

Planning estimate only. Review the assumptions alongside the result before using it for a tax, financing or business decision.

Common questions

Is this my tax deduction?

No. US MACRS, section 179, bonus depreciation and placed-in-service conventions require a separate tax calculation.

Why is declining-balance value above residual at the end?

A fixed-rate method may not depreciate to residual within the selected period. This tool does not automatically switch to straight-line or force a final write-down.

Put your numbers into context.

A calculator can help you ask better questions. Tell ZTax what you are planning and we will discuss the records, scope and support you need.

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