Sum-of-Years'-Digits Depreciation Calculator
Sum-of-the-years'-digits (SYD) accelerated depreciation with a full schedule — front-loaded but reaching exactly salvage value.
| Yr | Depreciation | Accumulated | Book value |
|---|---|---|---|
| 1 | $16,667 | $16,667 | $38,333 |
| 2 | $13,333 | $30,000 | $25,000 |
| 3 | $10,000 | $40,000 | $15,000 |
| 4 | $6,667 | $46,667 | $8,333 |
| 5 | $3,333 | $50,000 | $5,000 |
Schedule computed with the standard SYDformula. Figures are estimates for planning — your tax jurisdiction's rules, conventions and limits (and your accountant) govern the filed numbers.
Field notes from maintenance practice
For a 5-year asset the digits sum to 5+4+3+2+1 = 15, so year one gets 5/15 of the base, year two 4/15, down to 1/15 in year five. With $55,000 cost and $5,000 salvage, the $50,000 base gives $16,667 in year one falling to $3,333 in year five — front-loaded, but adding up exactly to the full depreciable base.
SYD suits assets that are most productive (or lose value fastest) early, like technology and vehicles, while guaranteeing a clean write-down to salvage — making it tidier than declining balance for book purposes, though less commonly used than straight-line or MACRS.
Sources & references
- US GAAP ASC 360 / IAS 16 — accelerated depreciation methods
Estimates for planning only — not tax, accounting or financial advice. Depreciation rules, conventions, limits and elections vary by jurisdiction and change yearly; confirm filed figures with a qualified accountant.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
Sum-of-Years'-Digits Depreciation Calculator for maintenance and reliability teams: Sum-of-the-years'-digits (SYD) accelerated depreciation with a full schedule — front-loaded but reaching exactly salvage value. Free, private (everything runs in your browser) and ready for daily plant use.
About Sum-of-Years'-Digits Depreciation Calculator
Sum-of-the-years'-digits (SYD) is an accelerated method that, unlike declining balance, depreciates the asset to exactly its salvage value by the end of its life. Each year's expense is the depreciable base (cost − salvage) multiplied by a declining fraction: remaining life over the sum of the years' digits.
How to use Sum-of-Years'-Digits Depreciation Calculator
- 1Enter the asset cost, and the salvage value and useful life (or rate) for the method.
- 2Add any first-year Section 179 or bonus expensing if your jurisdiction allows it.
- 3Read the first-year deduction and the full year-by-year schedule of depreciation, accumulated total and book value.
Why use Sum-of-Years'-Digits Depreciation Calculator?
- ✓Sum-of-the-years'-digits (SYD) accelerated depreciation with a full schedule — front-loaded but reaching exactly salvage value — computed instantly with the standard formula
- ✓100% free and unlimited, with no sign-up, login or paywall
- ✓Runs entirely in your browser — readings and asset data never leave your device
- ✓Niche-specific defaults and thresholds for sum of years digits, traceable to the cited standards
Frequently asked questions
How does the sum-of-years'-digits method work?+
Add the digits of the useful life (e.g. 5 years → 5+4+3+2+1 = 15). Each year's depreciation = (remaining useful life ÷ that sum) × depreciable base (cost − salvage). The fraction shrinks each year, so the expense is largest in year one and smallest in the last year, and the totals add up to exactly the depreciable base.
How is SYD different from declining balance?+
Both accelerate depreciation, but SYD uses a declining fraction of a fixed base (cost − salvage) and lands exactly on salvage value at the end, while declining balance applies a fixed rate to a shrinking book value and approaches but never reaches zero. SYD is 'cleaner' for guaranteeing full write-down; declining balance is simpler to compute year by year.
What's the sum-of-years'-digits for a 7-year asset?+
7+6+5+4+3+2+1 = 28. So year one gets 7/28 (25%) of the depreciable base, year two 6/28, and so on down to 1/28 in year seven. A handy shortcut for the sum is n(n+1)/2, which for n=7 is 7×8/2 = 28.
Is SYD accepted for tax purposes?+
It's primarily a book (financial-reporting) accelerated method recognised under GAAP/IFRS. For US tax, MACRS has largely superseded SYD; other jurisdictions may or may not permit it. Use SYD for management or financial-statement reporting where an accelerated, salvage-terminating profile fits the asset, and apply your jurisdiction's prescribed method for the tax return.
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<iframe src="https://tooljolt.com/tools/sum-of-years-digits-depreciation-calculator" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="Sum-of-Years'-Digits Depreciation Calculator — ToolJolt" loading="lazy"></iframe>Related tools
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