Devices can depreciate over time. AssetBolt calculates a current book value from a handful of inputs.
Depreciation applies to devices only.
Depreciation fields are not on the device create form. Open a device's detail page and edit them in place:
Depreciation method — Straight line (the default), Declining balance, or None.
Depreciation rate — used by declining balance.
Depreciation duration — used by straight line, in months.
Depreciation start — falls back to the purchase date if you leave it empty.
Salvage value — the floor the value never drops below.
You'll also need a purchase cost.
Enter 50 to mean 50% per year, not 0.5.
Straight line spreads the loss evenly:
value = cost − ((cost − salvage) ÷ duration in months) × months elapsed
If you don't set a duration, AssetBolt uses a default useful life of 60 months (5 years).
Declining balance applies the rate to the remaining value each year:
value = cost × (1 − rate)^years elapsed
None disables depreciation for that device.
Time elapsed counts completed whole calendar months since the depreciation start date. A device three weeks old has depreciated by nothing.
Book value never falls below the salvage value, which is itself clamped between zero and the purchase cost. A fully depreciated device sits at its salvage value indefinitely.
Book value is unavailable — and displays as N/A — when the device has no purchase cost, when the method is None, or when there is no start date and no purchase date to fall back on.
Where AssetBolt needs a number regardless, it falls back to the full purchase cost rather than showing nothing.
Purchase cost, current value, and salvage value are whole numbers. AssetBolt does not track cents.
The Depreciation report summarises book value across your devices. Reports require a Pro plan or higher. Summary totals cover every device, but the detail table and exports are capped at the first 1,000 rows, with a warning shown when a report exceeds that. See the Reports article for details.