Depreciation Calculator
Compute a year-by-year depreciation schedule for a tangible asset using Straight-line, Double-declining balance (200% declining balance with a salvage-value floor), or Sum-of-years'-digits. Enter the asset's cost, salvage value, and useful life, then compare the methods. All values are rounded to the cent, with the final period adjusted so the ending book value lands exactly on salvage. Runs locally in your browser.
Inputs
Schedule
Straight-line expenses the depreciable base (cost − salvage) evenly: each year gets (cost − salvage) / life. Declining balance applies a fixed rate to the current book value — 200% / life for double-declining, 150% / life for 150% — and never lets book value drop below salvage (the salvage floor), so the final depreciating period is clamped. This implementation uses pure declining balance without a mid-life switch to straight-line. Sum-of-years'-digits weights early years more: year k gets (cost − salvage) × (life − k + 1) / (life×(life+1)/2). Every method's total depreciation equals cost − salvage and ends at salvage value. Results are informational, not tax or accounting advice. Pairs with the Compound Interest, Loan, and ROI/Payback tools. Everything runs locally — nothing leaves your browser.