On the 20/4/10 rule, a ₹20 lakh CTC (about ₹1,29,800 a month in hand) supports a car of about ₹6.5 lakh on-road, and a ₹30 lakh CTC (about ₹1,81,400) supports one of about ₹9.1 lakh, with the loan at 9% over four years. Fuel, insurance, servicing and parking come on top, so test the full monthly cost, not just the EMI. Each rupee of monthly take home supports about ₹5 of on-road price, from about ₹5.1 lakh at ₹15 lakh CTC to ₹11.5 lakh at ₹40 lakh.

What does the 20/4/10 rule say?

The 20/4/10 rule is a rule of thumb for car affordability, not a lender's requirement: pay at least 20% of the on-road price as down payment, borrow for no more than four years, and keep the car loan EMI at or below 10% of take-home pay. Some versions fit fuel and insurance inside the 10%, or use gross income; this post uses take home and counts running costs separately.

At ₹20 lakh CTC, 10% of ₹1,29,800 is an EMI of ₹12,980. Over 48 months at 9% a year, that EMI repays a loan of about ₹5,21,600. The loan is 80% of the price, so the on-road price is ₹5,21,600 ÷ 0.8, about ₹6,52,000, with ₹1,30,400 down. In January 2026, new-car loans were quoted from about 7.4% to 14% a year, depending on the lender and the borrower's credit profile; 9% sits in that range.

Can Karan afford a ₹14 lakh car on ₹30 lakh CTC?

Karan's CTC is ₹30,00,000, and he takes home about ₹1,81,400 a month (the CTC to in-hand table shows the working). His 20/4/10 EMI cap is ₹18,140, which repays about ₹7,29,000 over four years at 9%. Add a 20% down payment and the rule's price for him is about ₹9.1 lakh.

The car he likes costs ₹14,00,000 on-road, and he has ₹2,00,000 for the down payment, about 14% of the price. The ₹12,00,000 loan at 9% over four years has an EMI of about ₹29,862, which is 16.5% of his take home, so on the rule the answer is no. To keep this car within the rule, he would need about ₹6,71,000 down.

What car price does each salary support?

At 9% over 48 months, with take home on the new regime for FY 2026-27 and PF on full wages:

CTC In hand a month EMI cap (10%) Loan On-road price
₹15 lakh ₹1,00,700 ₹10,070 about ₹4,04,700 about ₹5.1 lakh
₹20 lakh ₹1,29,800 ₹12,980 about ₹5,21,600 about ₹6.5 lakh
₹25 lakh ₹1,56,700 ₹15,670 about ₹6,29,700 about ₹7.9 lakh
₹30 lakh ₹1,81,400 ₹18,140 about ₹7,29,000 about ₹9.1 lakh
₹40 lakh ₹2,29,100 ₹22,910 about ₹9,20,600 about ₹11.5 lakh

If your employer pays PF only on the ₹25,000 ceiling, take home is higher, about ₹1,41,900 at ₹20 lakh CTC and ₹2,01,000 at ₹30 lakh, so the rule's price rises to about ₹7.1 lakh and ₹10.1 lakh. If you already pay a home or personal loan EMI, the car comes on top of it; what EMI to income ratio is safe looks at all your loans together.

What does a longer loan cost?

On Karan's ₹12,00,000 at 9%, a lower EMI costs more interest:

Tenure EMI Share of take home Total interest Left after 4 years
4 years about ₹29,862 16.5% about ₹2,33,400 nil
5 years about ₹24,910 13.7% about ₹2,94,600 about ₹2,84,800
7 years about ₹19,307 10.6% about ₹4,21,800 about ₹6,07,100

Seven years brings the EMI close to 10%, but it adds about ₹1,88,400 of interest and leaves more than ₹6 lakh owed on a four-year-old car. By then the depreciation schedule insurers use puts the car's insured value at 60% of its ex-showroom price; if about ₹12 lakh of his ₹14 lakh on-road price is ex-showroom, that is ₹7,20,000, and he still owes ₹6,07,100, about 84% of it.

What does the car cost to run each month?

Total cost of ownership is the EMI plus running costs, before the value the car loses each year. For a petrol car driven 1,000 km a month at 15 km a litre, fuel is about 67 litres, which at the ₹102 to ₹114 a litre charged in the four metro cities in October 2026 is about ₹6,800 to ₹7,600.

Insurance, servicing and parking vary by model, insurer and city, so these are Karan's estimates. Insurance is ₹30,000 a year from the second year (the first is in the on-road price), or ₹2,500 a month; servicing ₹15,000 a year, or ₹1,250; parking and tolls ₹1,250. With ₹7,000 of fuel, that is ₹12,000 a month.

On the four-year loan, his car costs ₹29,862 plus ₹12,000, about ₹41,862 a month, or 23% of his take home. On the 50/30/20 split, that is 46% of his ₹90,700 needs budget. The rule's ₹9.1 lakh car would cost ₹18,140 in EMI; with the same ₹12,000 of running costs that is ₹30,140 a month, or 17% of his take home.

His ₹41,862 is essential spending, so it counts towards his emergency fund: six months adds about ₹2,51,200. The emergency fund guide sets six months of essentials, or nine to twelve months for the only earner in a household with dependants, or anyone whose pay is largely variable.

Dhi looks at a car loan alongside your cash flow, net worth, protection and goals, and answers questions about it from your own numbers. Dhi nudges when spending needs attention, and earns no commissions.

Frequently asked questions

It is stricter than what a lender will allow. Lenders usually approve a larger loan, because they test all your EMIs together against income rather than one car against take home. The rule is useful as a ceiling for the car loan EMI that leaves the rest of your budget, savings included, untouched.
Paying cash avoids about ₹2,33,400 of interest on a ₹12 lakh loan over four years at an assumed 9%; the saving is that, less whatever the cash would have earned over the same period. It only works if the cash is not your emergency fund or money already invested for a goal, because using either swaps a visible EMI for a hidden gap. If you sell investments to raise the cash, any capital gains tax on the sale belongs in the comparison too.
Yes, if the rate is floating: loans to individuals for non-business purposes carry no prepayment charge under RBI rules, while a fixed-rate car loan can carry a charge or a lock-in set out in the sanction letter. On a ₹12 lakh car loan at an assumed 9% over seven years, clearing the ₹6,07,100 still owed after four years saves about ₹87,900 of the interest still to come, less what that cash would have earned over those three years. A fixed-rate lender's charge comes off that too: in 2026, nil at some banks once the loan is past its first one or two years, about 3% to 6% of the balance plus GST at others, highest in the first year, so work out the net figure before you prepay.

This is general information for salaried individuals in India, not personalised financial advice.