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 #
- Annual Salary (₹): gross yearly income (basis for 10% cap).
- Mobile Price (₹): total device price (MRP or negotiated).
- Upfront Payment (₹): cash you pay now; higher lowers EMI strain.
- EMI Tenure (months): planned instalment length (keep ≤ 6).
- Planned Usage Duration (years): how long you intend to keep the phone (target ≥ 2).
What the calculator shows #
- Price % of Salary: price ÷ annual salary (10% guideline).
- Upfront %: upfront ÷ price (aim ≥ 20%).
- Rules panel: pass / fail badges for each check.
- Final verdict: concise recommendation summarising gaps.
- Chart: visual slice of price% vs remaining salary.
Step-by-step #
- Enter Salary, Price and Upfront amount.
- Pick EMI Tenure (≤ 6 to satisfy rapid payoff).
- Set Usage Duration (≥ 2 for value retention).
- 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 #
- Price ≤ 10%: cost proportion is healthy.
- Upfront ≥ 20%: reduces financing exposure.
- EMI ≤ 6 months: quick payoff on depreciating asset.
- Usage ≥ 2 years: better value per rupee.
- 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 #
- Ignoring other EMIs / obligations when applying the 10% rule.
- Extending EMI purely to shrink monthly outflow; interest + commitment risk.
- Upgrading annually — erodes value per rupee rapidly.
mobile
affordability
budgeting
Published: 19 Aug 2025 • Author: HeroZero •