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Mobile Affordability Calculator Guide

A practical walkthrough of the 10‑2‑6‑20 rule to decide if a smartphone fits your budget wisely.


Guide ~3 min read

Use this guide alongside the calculator to quickly test a phone purchase against four simple affordability checks: 10% of salary, 20% upfront, ≤ 6 months EMI and ≥ 2 years usage.


Open the calculator #

Launch the Mobile Affordability Calculator. The results area updates live as you change inputs.


Fields you will fill #

  1. Annual Salary (₹): gross yearly income (basis for 10% cap).
  2. Mobile Price (₹): total device price (MRP or negotiated).
  3. Upfront Payment (₹): cash you pay now; higher lowers EMI strain.
  4. EMI Tenure (months): planned instalment length (keep ≤ 6).
  5. Planned Usage Duration (years): how long you intend to keep the phone (target ≥ 2).

What the calculator shows #

  1. Price % of Salary: price ÷ annual salary (10% guideline).
  2. Upfront %: upfront ÷ price (aim ≥ 20%).
  3. Rules panel: pass / fail badges for each check.
  4. Final verdict: concise recommendation summarising gaps.
  5. Chart: visual slice of price% vs remaining salary.

Step-by-step #

  1. Enter Salary, Price and Upfront amount.
  2. Pick EMI Tenure (≤ 6 to satisfy rapid payoff).
  3. Set Usage Duration (≥ 2 for value retention).
  4. Review the live rule statuses and verdict; iterate inputs if needed.

Rule Summary (10‑2‑6‑20)

10% price ceiling • 20% upfront • ≤6 months EMI • ≥2 years use.


How to interpret results #

  1. Price ≤ 10%: cost proportion is healthy.
  2. Upfront ≥ 20%: reduces financing exposure.
  3. EMI ≤ 6 months: quick payoff on depreciating asset.
  4. Usage ≥ 2 years: better value per rupee.
  5. All pass: green verdict; any fail suggests adjust price, upfront, or tenure.

Quick examples #

Conservative Buy

Salary ₹6,00,000 • Price ₹50,000 (8.3%) • Upfront 30% • Tenure 6 • Usage 2 → All pass.

Risky Buy

Salary ₹3,00,000 • Price ₹50,000 (16.7%) • Upfront 10% • Tenure 12 → Multiple fails (reconsider).


Common mistakes #

  1. Ignoring other EMIs / obligations when applying the 10% rule.
  2. Extending EMI purely to shrink monthly outflow; interest + commitment risk.
  3. Upgrading annually — erodes value per rupee rapidly.

mobile affordability budgeting

Published: 19 Aug 2025 • Author: HeroZero •
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