Fixed Asset Depreciation Calculator & Audit Tool
Calculate depreciation across 4 methods with audit-ready compliance documentation
What You Can Do
You can calculate depreciation expense across multiple methods, maintain accurate asset registers, reconcile accumulated depreciation to the general ledger, and automatically flag compliance issues. This skill generates audit-ready documentation with supporting schedules, reducing manual calculation errors and accelerating month-end close procedures while creating defensible audit trails for fixed asset transactions.
Features
straight-line, declining balance, units-of-production, and sum-of-years-digits with method comparison
track acquisitions, retirements, salvage values, and useful life assumptions with full audit trail
verify accumulated depreciation accounts against calculated schedules and flag variances
automatically flag GAAP violations, useful life inconsistencies, and salvage value outliers
evaluate asset carrying values and test for potential write-downs
match book values to physical counts with disposal documentation
document method changes, revaluation adjustments, and retirement transactions
generate management reports with asset composition, age analysis, and supporting calculations
Example Output
Example 1: Straight-Line Depreciation Schedule
| Asset ID | Description | Cost | Salvage | Life (Years) | 2024 Expense | Accumulated | NBV |
|---|---|---|---|---|---|---|---|
| FA-2022-001 | Machinery | $50,000 | $5,000 | 10 | $4,500 | $13,500 | $36,500 |
| FA-2023-045 | Equipment | $25,000 | $2,500 | 8 | $2,812.50 | $2,812.50 | $22,187.50 |
Compliance Flags: ✓ All assets have useful lives within industry norms ⚠ Asset FA-2020-012: Accumulated depreciation exceeds 90% of cost — consider retirement review ✓ Salvage values reasonable and consistently applied
Example 2: Declining Balance Method Comparison
Asset: Delivery Fleet ($100,000, 5-year life, 20% residual)
- Straight-line annual expense: $16,000
- 150% declining balance (Year 1): $30,000
- Switch to straight-line (Year 4): $10,000
Example 3: Month-End Close Summary
Total depreciation expense recognized (Jan 2024): $87,450 Variance to prior month: +$2,100 (new asset additions) Accumulated depreciation reconciliation: ✓ Matches GL balance
What's Included
- SKILL.md instruction file with multi-method depreciation framework and audit workflow:
- Asset Register Template: CSV/Excel structure for tracking acquisitions, retirements, and useful life data
- Depreciation Calculation Workbook: pre-built formulas for straight-line, declining balance, units-of-production, and sum-of-years-digits methods
- GL Reconciliation Checklist: step-by-step verification procedures for accumulated depreciation accounts
- Audit Documentation Checklist: compliance flags, impairment testing triggers, and supporting schedule requirements
Who It's For
- Staff Accountants — manage fixed asset accounting, month-end close, and depreciation schedules
- Junior Auditors — test depreciation calculations, verify asset additions/retirements, and support control testing
- Accounting Managers — oversee asset register accuracy, reconcile GL balances, and prepare financial statement support
- Internal Audit — evaluate fixed asset control design and test depreciation methodology compliance
- Financial Analysts — assess asset composition, age trends, and potential impairment concerns
Best For
- Monthly/quarterly/annual depreciation expense calculations across asset classes
- Building asset addition schedules and tracking capital purchases
- Reconciling accumulated depreciation accounts to general ledger
- Verifying asset useful lives, salvage values, and depreciation method consistency
- Preparing depreciation support schedules for audit fieldwork and financial statement close
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