Build a Defensible Depreciation Table From Your Data
Upload your cost data, and get an audit-ready depreciation schedule in minutes. Free, fast, and backed by transparent methodology.
Everything you need to build a defensible depreciation schedule
From raw data to exportable, audit-ready tables in a guided workflow.
Upload Your Data
Drop in a CSV or XLSX with your cost and sales data. We auto-detect columns and validate everything.
Auto-Generate Tables
Compute depreciation schedules by age and building type with robust smoothing and outlier handling.
Export Everything
Download your depreciation table as CSV, XLSX, or a full PDF methodology memo with validation results.
Defensible Methodology
Transparent, reproducible methodology with holdout testing, sample size reporting, and monotonicity enforcement.
From spreadsheet to defensible table in 3 steps
No coding, no stats background required. Just your data and 10 minutes.
Upload
Upload your CSV or XLSX file with property data. Use our template or your own columns -- we auto-detect common field names.
Configure
Map your columns, choose your calibration path, and set parameters like smoothing method, outlier thresholds, and age buckets.
Export
Review your depreciation table with diagnostics, then export as CSV, XLSX, or a full PDF methodology memo.
Built for defensibility
Your depreciation tables need to withstand scrutiny. Every output is designed for transparency, reproducibility, and audit readiness.
Transparent Methodology
Every computation step is documented. See exactly how your table was built, what data was used, and what assumptions were made.
Holdout Validation
An automatic train/test split measures how well your table predicts unseen data. Report error metrics with confidence.
Monotonicity Enforcement
Isotonic regression ensures your depreciation table is monotonically non-decreasing with age -- no inexplicable jumps.
Sample Size Reporting
Every age bucket shows its observation count. Thin bins are flagged, so you know exactly where your data is strong or weak.
Outlier Documentation
IQR-based outlier detection removes anomalies and documents every exclusion with specific reasons.
Export-Ready Artifacts
Generate a PDF methodology memo with tables, validation results, and disclaimers -- ready for appeals boards and audits.
Ready to rebuild your depreciation tables?
Upload your data and get a defensible depreciation schedule in minutes. No account required.