How much should I invest monthly for a ₹50 lakh goal?

A number without a date is not a plan

Kavya is thirty-four and handles the household money. Rohit is thirty-six and handles the opinions. Their ₹50 lakh had never been written anywhere. That meant it could not be wrong, could not be missed, and could not be worked towards. It just sat in the background. Each time a bonus arrived and got used on ordinary life, they felt a little guilty.

A target with no date cannot produce a monthly figure at all. The maths has nowhere to start. Ten years and four years are not two versions of the same wish. They are two different monthly amounts, and one of them may be too high for a household with a car loan and school fees.

So the first decision that evening was not about returns or funds. It was one sentence, said out loud and then typed: we want ₹50 lakh available in the year our daughter turns fourteen, which is ten years from now. Everything else in this article follows from that sentence.

Is your ₹50 lakh today’s money or 2036 money?

Here is where the couple nearly made the most common mistake in goal planning. It took twenty minutes of talking to notice it. Rohit meant ₹50 lakh as a named amount: a bank balance showing 50,00,000 in ten years, whatever that buys by then. Kavya meant the buying power of ₹50 lakh as it feels today, what it would purchase in the market this year, at today’s prices.

Inflation reduces purchasing power, so those two meanings are not the same. At 5% inflation, something costing ₹50 lakh today would cost more in ten years. A plan aimed at a flat ₹50 lakh would fall short of Kavya’s version of the goal, even if every rupee arrived on time.

Neither reading is wrong. Mixing them is. Decide once, write the choice next to the goal, and keep it the same at every review. If the target is a buying-power goal, raise it for inflation to the target date and aim at the larger named number. If it is a named future corpus, a specific bill, or a fixed down payment agreed with someone else, keep it as a named amount and leave inflation out of the target itself.

What the monthly figure actually is

The calculation on this page is not complicated. It takes the gap between what you already have and what you want, spreads it across the months you have, and accounts for the fact that early payments have more time to grow than late ones. The result is a level monthly payment: the same amount every month, for the whole period.

Two inputs matter more than people think. The starting balance matters because money already invested keeps growing for the full term without you adding more to it. And the number of years matters in a way that surprises people: cutting a ten-year goal to five years does not double the monthly figure. It raises it by more than double, because the shorter period gives growth much less time to help.

It is also worth being clear about what this figure is not. It is not a mutual-fund SIP. A SIP is an instruction you give a fund house to buy units on a schedule. This is arithmetic on a target. Nothing here picks a scheme, an asset class, or a product. Nothing here knows about exit loads, expense ratios, taxes on selling, or the months you might have to pause.

• Target amount: what you want available, stated as either today’s buying power or a future named figure
• Starting balance: money already earmarked for this goal, which keeps growing without further effort
• Years: the single input with the most effect on the monthly number
• Assumed return: your belief about growth, and the input most likely to be wrong

Three return paths, because one guess is not enough

Kavya’s first question was which return rate is correct. There is no correct answer in advance, so they treated return as a dial and looked at three paths. 0% shows the cash you would need if money does not grow, the only path that depends on saving alone. A moderate base such as the 9% default. A higher rate lowers the monthly figure and makes more of the plan depend on markets doing well for a decade.

That trade-off is the point. A high assumed return does not make a goal cheaper. It makes a shortfall show up later, when there is less time to fix it. Returns are not guaranteed, and none of these paths is advice about what to buy. They are three ways of seeing how much of the plan depends on markets, and how much depends on you.

What the calculator just showed you

Read the output as a way to see how the number moves, not as a final answer. The useful question is not what the middle figure says. It is how far the figure moves when you change one input by a realistic amount. For most ten-year goals, adding a year or two to the deadline eases the monthly pressure more reliably than raising the assumed return by a couple of percentage points. It is also the one lever that does not need the market to agree with you.

If the monthly figure is more than you can pay, that is information, not failure. There are four honest responses. You can extend the date, reduce the target, increase the contribution by finding room in the monthly budget, or add to the starting balance from something you already hold. Raising the assumed return until the figure looks comfortable is not a fifth option. It only pushes the shortfall into the future, when you have less time to fix it.

Every figure on this page treats contributions as regular and uninterrupted, ignores taxes and costs of buying and selling, and assumes a smooth return rather than the uneven sequence real markets deliver. Real ten-year journeys include a job change, a medical year, and at least one stretch where the balance stops growing for a while.

Nothing gets saved until you say so

When Kavya opened Goal Manager from this page, the form arrived already filled with the illustrated target, the date, and the return she had been testing. That is a draft, and drafts do not auto-save. Nothing is stored, tracked, or counted towards your plan until you review the details and confirm them yourself.

That pause is on purpose, and it is where the useful work happens. A generic target copied from an article is worth very little. The same goal named "daughter’s school transition fund, needed by June 2036" is easier to review, because you can tell in one glance whether it still matches your life. Change the name. Correct the date to the month you actually need the money. Set the assumed return to a number you can stand by, not the one that made the monthly amount look easy.

Rohit made one more edit before saving: he moved ₹1,80,000 of existing savings into the starting balance, because that money was already sitting there for this purpose.

The saved goal will sit on whichever profile is active when they confirm. Kavya can later link Portfolio Tracker holdings to it, including a holding that lives on another profile in the same account, if that profile allows cross-profile data access. The holding stays on its own ledger. The goal only counts its current value toward progress.

• Rename the goal so you later know what it was for without thinking
• Set the date to the month the money is genuinely needed, not a round year
• Enter any existing savings already earmarked for this goal as the starting balance
• Record whether the target is today’s buying power or a future named amount

Come back to the figure twice a year

Six months later the couple’s review took about nine minutes. They compared the actual balance with the path the plan implied, and saw they were slightly behind because two months were skipped during a house move. They let the date stretch by one quarter rather than pretend the gap did not exist. That is how a goal survives real life. Small honest corrections twice a year work better than one big plan that later stops matching real life.

Westro keeps the target, the date, the assumptions, and the current balance in one place so the comparison is a reading exercise. It does not choose products or promise returns. A suitable target depends on your income stability, obligations, tax situation, and how large a fall you could sit through. For a decision this size, qualified advice is worth considering.

The ₹50 lakh wish itself did not change that evening. It just became a monthly number with a date. That is the form that can actually be followed.