@finprecise/depreciation

Excel-compatible depreciation methods for the finprecise financial calculation engine.

Install

npm install @finprecise/depreciation @finprecise/core

API

sln — Straight-Line

import { sln } from "@finprecise/depreciation";

// $30,000 asset, $7,500 salvage, 10-year life
sln("30000", "7500", "10"); // → 2250

db — Fixed-Declining Balance

import { db } from "@finprecise/depreciation";

// $1,000,000 asset, $100,000 salvage, 6-year life, period 1
db("1000000", "100000", "6", "1"); // → 319000

// With partial first year (9 months)
db("1000000", "100000", "6", "1", "9");

ddb — Double-Declining Balance

import { ddb } from "@finprecise/depreciation";

// $1,000,000 asset, $100,000 salvage, 6-year life, period 1
ddb("1000000", "100000", "6", "1"); // → 333333.33

// Custom factor (e.g., 1.5 for 150% declining)
ddb("1000000", "100000", "6", "1", "1.5");

syd — Sum-of-Years-Digits

import { syd } from "@finprecise/depreciation";

// $30,000 asset, $7,500 salvage, 10-year life, period 1
syd("30000", "7500", "10", "1"); // → 4090.91

Compatibility

| Function | Excel | Description | |---|---|---| | sln | SLN | Straight-line depreciation | | db | DB | Fixed-declining balance | | ddb | DDB | Double-declining balance | | syd | SYD | Sum-of-years-digits |

License

MIT