Enter Asset Inputs
Example Data Table
Example asset: industrial compressor, cost 50,000, salvage 5,000, useful life 5 years, automatic straight-line switch enabled.
| Year | Opening Value | Method | Depreciation | Accumulated | Ending Value |
|---|---|---|---|---|---|
| 2026 | 50,000.00 | Double Declining Balance | 20,000.00 | 20,000.00 | 30,000.00 |
| 2027 | 30,000.00 | Double Declining Balance | 12,000.00 | 32,000.00 | 18,000.00 |
| 2028 | 18,000.00 | Double Declining Balance | 7,200.00 | 39,200.00 | 10,800.00 |
| 2029 | 10,800.00 | Double Declining Balance | 4,320.00 | 43,520.00 | 6,480.00 |
| 2030 | 6,480.00 | Salvage Limit Applied | 1,480.00 | 45,000.00 | 5,000.00 |
Formula Used
Double Declining Rate: Annual Rate = 2 / Useful Life
DDB Depreciation: Depreciation Expense = Opening Book Value × Annual Rate
Straight-Line Switch: Remaining Straight-Line Expense = (Opening Book Value − Salvage Value) / Remaining Years
Ending Book Value: Ending Book Value = Opening Book Value − Depreciation Expense
Salvage Rule: Ending book value cannot fall below the salvage value.
How to Use This Calculator
- Enter the asset name for your engineering equipment.
- Provide the original purchase cost.
- Enter the expected salvage value.
- Set the useful life in years.
- Choose the service start year.
- Keep the straight-line switch enabled for smoother end-year results.
- Click the calculate button to build the yearly schedule.
- Review the summary cards, data table, and Plotly graph.
- Use the CSV or PDF buttons to export results.
Frequently Asked Questions
1. What does double declining balance mean?
It is an accelerated depreciation method. It records larger expense amounts in earlier years. This suits assets that lose value faster during the beginning of service life.
2. Why is this useful for engineering assets?
Engineering machines, production tools, and technical systems often deliver their heaviest output early. Accelerated depreciation can better reflect wear, usage intensity, and financial planning needs.
3. How is the annual rate calculated?
The rate equals two divided by the useful life. A five-year life gives a 40% annual rate. The calculator applies that rate to the opening book value each year.
4. Why does the calculator protect salvage value?
Salvage value is the lowest allowed ending value. Depreciation should not reduce the asset below that floor. The calculator automatically limits the final depreciation amount when needed.
5. What does the straight-line switch do?
Near the end of useful life, straight-line may fit the remaining balance better. This option helps the schedule move toward salvage value without creating awkward leftover book value.
6. Can I export the depreciation schedule?
Yes. After calculation, use the CSV button for spreadsheet work. Use the PDF button for reports, documentation, and printable engineering asset review records.
7. Does this calculator work for any currency?
Yes. Enter your preferred currency symbol. The schedule, summary values, and exports will display that symbol, making the output easier for local accounting review.
8. What is shown in the Plotly graph?
The chart plots yearly depreciation, accumulated depreciation, and ending book value. This makes cost recovery patterns easier to compare across the full useful life.