If you have a retirement corpus, a bonus, an inheritance or the proceeds of a property sale, the natural question is how much lump sum investment monthly income it can give you. The answer depends on three things: how much you invest, the return it earns, and whether you want to keep the original amount intact or are happy to use it up slowly.
Method 1: Live on the interest and keep the principal
This is how a monthly-payout fixed deposit, a bond or a senior citizen savings scheme works. You only take out what the money earns, so the original amount stays the same for as long as you like.
Formula: Monthly income = Lump sum × yearly rate ÷ 12
| Lump sum | Yearly return | Monthly income |
|---|---|---|
| 10,00,000 | 7% | 5,833 |
| 10,00,000 | 8% | 6,667 |
| 25,00,000 | 7.5% | 15,625 |
| 50,00,000 | 8% | 33,333 |
The upside is safety: your capital is preserved. The downside is that the income stays flat while prices rise, so its buying power shrinks every year. You can estimate interest payouts with our FD calculator.
Method 2: Systematic withdrawal (use up the money slowly)
If you invest the lump sum in a mutual fund and set up a systematic withdrawal plan (SWP), you take a fixed amount every month. Part of each payment is return and part is your own capital, so you can withdraw more than the interest alone.
Formula: Monthly income = P × i ÷ (1 − (1 + i)−n), where P is the lump sum, i is the monthly return (yearly rate ÷ 12) and n is the number of months.
| Lump sum | Return | Period | Monthly income |
|---|---|---|---|
| 10,00,000 | 8% | 10 years | 12,133 |
| 10,00,000 | 8% | 20 years | 8,364 |
| 25,00,000 | 8% | 15 years | 23,891 |
At the end of the period the balance reaches zero. If you withdraw less than these figures, money is left over; withdraw more and it runs out sooner. Market-linked funds do not earn a steady 8% every year, so review your withdrawal once a year.
How much lump sum do I need for a monthly income?
Turn the first formula around: Lump sum needed = Monthly income × 12 ÷ yearly rate.
- For 50,000 a month at 8%: 50,000 × 12 ÷ 0.08 = 75,00,000.
- For 30,000 a month at 7%: 30,000 × 12 ÷ 0.07 = about 51,42,857.
If you are planning for retirement and want to include inflation and the number of years you will draw income, use our retirement calculator.
Which option should you choose?
| Interest only | Systematic withdrawal | |
|---|---|---|
| Monthly income | Lower | Higher |
| Capital at the end | Fully intact | Reduces, can reach zero |
| Best for | Leaving money to family, very safe income | Fixed period, higher spending needs |
| Common products | FD monthly payout, bonds, annuities | Mutual fund SWP |
Many people combine both: they keep a few years of expenses in safe deposits for steady income and invest the rest for growth, topping up the safe part every few years.
Tips before you invest a lump sum for income
- Keep an emergency fund separate so you are never forced to sell investments at a bad time.
- Think about tax. Interest is usually taxed as income, while SWP withdrawals are taxed only on the gains portion, which can make SWP more tax-efficient.
- Plan for inflation. At 6% inflation, prices roughly double in 12 years, so an income that feels comfortable today will feel tight later.
- Check the growth first. If you do not need income yet, see how much the amount could grow with our lump sum calculator, then start withdrawals later.
Calculators used in this guide
Lump sum investment monthly income – FAQs
How much monthly income will I get from 10 lakh?
At an 8% yearly return, 10 lakh gives about 6,667 a month if you keep the principal, or about 12,133 a month for 10 years if you let the balance run down to zero.
What is the formula for monthly income from a lump sum?
If you keep the principal: lump sum × yearly rate ÷ 12. If you use up the money over n months: P × i ÷ (1 − (1 + i)^−n), where i is the monthly rate.
How much lump sum do I need for 50,000 per month?
At 8% a year you need about 75 lakh to earn 50,000 a month from interest alone (50,000 × 12 ÷ 0.08).
Is SWP better than a monthly FD payout?
SWP can pay more and is often more tax-efficient, but it uses up your capital and depends on market returns. A monthly FD payout keeps your capital safe but pays less.
Further reading: Compounding explained (Investor.gov, U.S. SEC)