Declining Balance Depreciation Calculator
Calculate accelerated depreciation using declining balance or double declining balance, with year-by-year book values and the switch point to straight-line.
📉 Accounting📐 Annual depreciation = book value × (factor / useful life)💼 Business
Asset cost
Salvage value
Declining balance factor
Useful life (years)
Year to display
Please enter valid values.
Formula & Reference
| Variable | Symbol | Formula | Units |
|---|---|---|---|
| Declining Balance Depreciation Calculator | — | Annual depreciation = book value × (factor / useful life) | currency per year |
Step-by-Step Examples
Example 1
Double Declining
Cost 60,000, salvage 6,000, 5 year life, 200% factor, year 2.
- Rate = 2 / 5 = 40% of book value
- Year 1 = 60,000 × 40% = 24,000, book 36,000
- Year 2 = 36,000 × 40% = 14,400, book 21,600
- Straight-line would charge 10,800 evenly
✓ Year 2: 14,400, book value 21,600
Example 2
Salvage Floor
Cost 60,000, salvage 6,000, 5 years, 200%, year 5.
- Book value approaches salvage in later years
- Depreciation is capped so book value never falls below 6,000
- Final year charge is reduced to hit the floor exactly
✓ Depreciation limited by salvage floor
Example 3
150% Declining
Cost 60,000, salvage 6,000, 5 years, 150% factor.
- Rate = 1.5 / 5 = 30%
- Year 1 = 18,000 versus 24,000 under double declining
- Less aggressive front-loading
✓ Year 1: 18,000 at 150%
Real-World Applications
Tax Deferral
Accelerated depreciation front-loads deductions, deferring tax to later periods and improving near-term cash flow.
Technology Assets
Assets losing value fastest early — computers, vehicles — are better matched by declining balance than straight-line.
Method Selection
Total depreciation is identical across methods; only the timing differs, which matters for tax and reported profit profile.
Book Value Realism
For rapidly depreciating assets, declining balance book values track market values more closely.
Common Mistakes to Avoid
⚠️
Depreciating below salvage value
The charge must be limited so book value never falls below salvage. Applying the rate mechanically in later years breaches this.
⚠️
Forgetting the switch to straight-line
Many tax regimes switch to straight-line once it yields a larger deduction than declining balance, maximising the annual charge.
⚠️
Assuming accelerated methods reduce total tax
They defer tax rather than reduce it. Total depreciation over the asset's life is the same under any method.
Frequently Asked Questions
What is declining balance depreciation? ▾
An accelerated method applying a fixed percentage to the reducing book value each year, producing larger charges early and smaller ones later.
What is double declining balance? ▾
Declining balance using twice the straight-line rate. For a five-year asset, that is 40% of book value annually rather than 20% of cost.
When should I use accelerated depreciation? ▾
For assets that lose value or productivity fastest in early years, and where deferring tax improves cash flow.
Does declining balance reduce total depreciation? ▾
No. Total depreciation over the asset's life equals cost minus salvage under every method. Only the timing of recognition differs.
What is the switch to straight-line? ▾
Once the straight-line charge on remaining book value exceeds the declining balance charge, many regimes switch methods to maximise the deduction.