Needs Assessment Calculator

This calculator scores a potential purchase on a 0-100 Needs Score using a weighted blend of five factors: how essential you rate it (Necessity, weighted 0.35 — the single largest weight in the formula), how often you'd use it (Usage Frequency, 0.25), whether a cheaper alternative exists (No Alternative, 0.15), how calm or reactive you feel making the decision (Emotional State, 0.15), and a step-function Affordability Score built from cost as a percentage of income (0.10, lines 43-58). Necessity Rating therefore moves the score more than any other single input. Classification then buckets that score into five bands: 75+ reads as a clear need, 60-74 a justified want, 45-59 borderline, 30-44 likely impulse, and below 30 a definite impulse (lines 63-67). Purchase Cost and Monthly Income don't move Needs Score at all at this calculator's own defaults ($200 against $5,000 income, 4% of pay) — a small nudge to either stays inside the same 1%-5%-of-income Affordability bracket (line 35), so Affordability Score holds steady at 80 and the overall score doesn't budge.

That's a property of this particular price point, not a rule: push Purchase Cost past roughly $250 (5% of income) and Affordability Score drops a full bracket, pulling Needs Score down with it. Recommended Wait scales with cost-to-income and the need score together — it only falls to zero hours when cost is under 1% of income AND the need score is already 70 or higher (line 71); otherwise it climbs from 24 hours up to a full 30 days as cost eats a bigger share of income, regardless of how the item scored. Impulse Risk flags only when Emotional State is 4 or below and Needs Score is under 50 at the same time (line 86) — a low score alone, or stress alone, isn't enough to trip it. This tool doesn't verify your self-ratings or track actual purchase history.