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Depreciation calculator
Work out how much a business asset loses in value each year and its book value: a car, machine, computer or fixtures. Straight-line (same each year) or declining balance (fixed percentage of book value).
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Depreciation table
Which useful life and method are allowed for tax is something to settle with your accountant. Declining balance here uses twice the straight-line rate and switches to straight-line once that gives more.
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A helpful tool, not tax or legal advice. Check important amounts.