EMI versus the rest of your pay

Why a percentage can mislead you

You will meet the same slogan many times. Keep your EMIs under 40% of income. Sometimes the figure is 35%, sometimes 50%. Lenders like ratios because a ratio is easy to apply to ten thousand applicants without knowing any of them.

You are not ten thousand applicants. You are one household with rent, school fees, parents, medicine, a pet, a cheap phone plan and a habit of buying lunch at work. Two people with the same salary can have a very different amount left each month.

Look at two households that earn ₹80,000 in hand.

• Household A lives with family, pays ₹4,000 towards groceries and ₹6,000 in transport. Fixed costs come to about ₹25,000. Leftover is about ₹55,000.
• Household B pays ₹26,000 in rent, ₹9,000 in school fees, ₹14,000 in groceries and ₹8,000 to support a parent. Fixed costs are about ₹70,000. Leftover is about ₹10,000.

A 40% rule gives both households the same ceiling of ₹32,000. For Household A, that payment is heavy but possible. For Household B, it is impossible. The rule did not see the school fees.

That is why this article keeps coming back to leftover money. The slogan is a smoke detector. It tells you to look harder. It does not tell you the house is safe.

The article on how much of your salary should go to EMI covers the ratio itself. Here the focus is on the rest of your pay, which is what the EMI actually competes with.

Start with take-home, not CTC

The first mistake happens before any loan sum. People divide by the number in the offer letter.

An offer letter in India usually states a CTC, which is the cost to the company. It includes employer provident fund, gratuity, insurance and sometimes a variable bonus that is not paid every month. A person with a CTC of ₹12,00,000 does not see ₹1,00,000 a month in the bank. Depending on the tax regime, the variable part and the provident fund share, the in-hand amount may sit well below that figure.

Other countries have similar gaps in different forms. A US salary is cut by federal and state income tax, Social Security and Medicare. A UK salary is cut by income tax and National Insurance. The label changes. The gap remains.

Use take-home pay for every EMI test. Three ways to find it:

• Read your last three payslips and use the lowest net amount, not the best one.
• Use the salary calculator to turn a CTC into an estimate of monthly in-hand pay.
• Read the CTC to in-hand salary guide if you want to see where each deduction comes from.

If part of your pay is variable, do not count it. Treat bonus months as a gift and plan on the fixed amount. A bonus that fails to arrive is one of the most common reasons an EMI becomes hard.

Build the ceiling from leftover money

Here is a method you can do on one page of paper. It takes about twenty minutes the first time.

1. Write your monthly take-home. Use the safe figure from your payslips.
2. List the fixed costs. Rent or housing, utilities, internet and phone, school fees, insurance premiums, transport to work.
3. Add food and daily needs. Use the average of the last three months, not a guess. A bank statement or an expense tracker makes this easy.
4. Add support you give to others. Parents, siblings, relatives. Include it even if it is informal.
5. Add existing EMIs and card payments. Count the minimum due at least. Better, count what you really pay.
6. Add a small amount for fun. If a plan leaves nothing for ordinary life, it will fail by the third month.
7. Add a buffer line. A monthly amount that goes into an emergency fund. Even ₹3,000 to ₹5,000 helps.
8. Subtract the total from take-home. What remains is your leftover money.

Now think of the leftover as the absolute ceiling for a new EMI. Do not use all of it. A prudent household aims for 70 to 80% of the ceiling. That margin absorbs a small rise in prices, a medical bill, or a month in which income falls short.

If leftover is zero or negative, a new loan is not a planning question. It is a budget problem that needs a different fix: lower costs, higher income, or no loan.

The EMI formula in plain words

An EMI is the same payment every month that repays both principal and interest over a set number of months. The standard formula is:

EMI = P × r × (1 + r)^n ÷ ((1 + r)^n − 1)

P is the loan amount. r is the monthly interest rate, which is the annual rate divided by 12. n is the number of months. You do not need to do this by hand. The EMI calculator does it in one step, and the how to calculate EMI guide walks through the formula with a small example.

What matters is how each of the three inputs moves the payment.

• A bigger loan raises the EMI in direct proportion.
• A higher rate raises the EMI, and raises total interest even more.
• A longer tenure lowers the EMI and raises the total interest, sometimes by a lot.

Here is a ₹5,00,000 personal loan at 12% a year. Only the tenure changes.

• 2 years (24 months): EMI about ₹23,540. Total repaid about ₹5,64,900. Interest about ₹64,900.
• 3 years (36 months): EMI about ₹16,610. Total repaid about ₹5,97,900. Interest about ₹97,900.
• 5 years (60 months): EMI about ₹11,120. Total repaid about ₹6,67,300. Interest about ₹1,67,300.

The five-year EMI is less than half the two-year EMI. The interest is more than two and a half times as much. Neither is wrong. They suit different budgets. But a household that stretches tenure only to squeeze under a salary ratio has bought a lower monthly bill at a high price.

How tenure changes the rest of your pay

The rest of your pay is shaped by what you do with the tenure. Think of tenure as a dial between two goals: a comfortable month and a cheap loan.

A short tenure gives:

• A higher EMI, which squeezes the rest of the budget now.
• Lower total interest and an earlier debt-free date.
• A shorter period in which a job loss or a rate rise can hurt you.

A long tenure gives:

• A lower EMI and more room each month.
• A larger total interest cost.
• A longer commitment during which your life will change several times.

A middle path works well for many borrowers. Take a tenure that keeps the EMI at or below 70 to 80% of your leftover money. Then plan to prepay when you can, such as a bonus or a tax refund, if the lender allows it without a heavy penalty. That keeps the monthly commitment small and the option of finishing early open.

Before you choose, read the guide on how much EMI fits your pay. It lays out the same test in a short checklist form.

A personal loan and a home loan are different animals

The test is the same for every loan, but the numbers differ a lot.

A personal loan is short, often unsecured and usually costs more per rupee. Rates are higher, tenures are 1 to 5 years, and the lender can see only your salary, not your collateral. Use the personal loan EMI calculator with the rate on your actual offer. Check the processing fee too, since it comes out of the amount you receive.

A home loan is long, secured by the property and usually cheaper per rupee. It is also the biggest commitment most people make. A ₹40,00,000 loan at 8.5% shows how tenure matters over decades:

• 15 years: EMI about ₹39,390. Total repaid about ₹70.9 lakh.
• 20 years: EMI about ₹34,710. Total repaid about ₹83.3 lakh.
• 25 years: EMI about ₹32,210. Total repaid about ₹96.6 lakh.

Moving from 15 to 25 years lowers the EMI by about ₹7,180 a month and adds about ₹25.7 lakh of interest. For a home loan, the mortgage calculator lets you set the down payment, rate and tenure in one place.

Add the costs that sit outside the EMI. Property tax, maintenance, repairs, insurance and utilities rise with a home. A buyer who only counts the EMI will find the rest of the month smaller than expected.

Count every other payment, not just the new one

Lenders add up all your obligations. You should too. People often forget these:

• Credit card minimum payments, and any balance rolling from month to month.
• Buy now, pay later plans and store instalments.
• A two-wheeler or phone EMI that ends in a year or two.
• Money you owe to family or friends on a schedule.
• Insurance premiums that are due yearly or quarterly and fall into one month.

A fast way to see the total is to take the sum of all debt payments in a normal month and divide it by take-home pay. Do this before the new loan and after it. If the after-ratio is above 40%, take extra care. If it is above 50%, most households will feel the pressure daily.

Use the loan eligibility calculator to see roughly how much a lender might offer at your income. Remember what that figure means. It is the amount a lender may be willing to lend, not the amount you can comfortably repay. Eligibility looks at the lender's risk. Your plan looks at your month.

Run a bad-month version of the plan

Any plan looks good when everything goes right. Make the plan prove itself in a poor month.

Try these three tests on paper:

1. Income drops by 10%. Maybe a bonus is cut or overtime stops. Does the budget still close?
2. One surprise bill of one month's EMI. A medical bill, a repair, a school trip. Can the buffer absorb it?
3. A rate rise of 1 percentage point. This only matters on a floating-rate loan, but many home loans are floating.

For the third test, take the ₹40,00,000 home loan over 20 years. At 8.5% the EMI is about ₹34,710. At 9.5% it is about ₹37,290. That is about ₹2,580 more every month, for the same loan. Many lenders let the tenure stretch instead of raising the EMI, which hides the pain but adds years to the loan.

If the plan survives all three tests with room to spare, it is probably sound. If it fails even one, make the loan smaller, the tenure a little longer, or the down payment bigger, then test again.

Single income, dual income, and variable pay

Your risk depends on how your household earns.

• A single earner carries the most risk, because one job loss ends all income. A lower share of income for EMI and a bigger buffer make sense.
• A dual-income couple has more resilience, but only if both incomes are steady and both people agree on the plan. Base the EMI on the lower income or on a figure you could meet if one person stopped working for a few months.
• Variable pay or freelance work needs the strictest approach. Use the lowest income of the last twelve months, not the average. Keep a buffer of six months of costs, including the EMI.
• Government or stable salaried jobs have a steadier income, but costs still change. The same leftover test applies.

Also think about what is coming. A child, a move, parents who will need support, or a plan to study again. These change the rest of your pay, and they rarely arrive on schedule.

The article Plan your loan EMI before you apply covers the paperwork side of the same decision, including what to check before you sign.

Worked example from start to finish

Ravi earns ₹85,000 a month in hand. He wants a personal loan of ₹4,00,000 to renovate a flat. He has one existing EMI of ₹4,500 for a bike.

Frequently asked questions