The goal amount that buys less later

Why the old number stops being the right number

You see a price and write it down. A fee of ₹10,00,000. A car deposit of ₹4,00,000. A house deposit of 20,000 dollars. You open a savings plan and aim straight at that figure.

Then the clock runs. Three, five or ten years pass. The same fee, car or deposit now carries a bigger price tag. Your account reaches the number you wrote down, and the purchase is still out of reach.

Nobody did anything wrong. The target was a snapshot, and the thing you wanted kept moving. The gap shows up late, usually in the last year, when there is little time to fix it.

Two clocks are running at once:

• The saving clock. Your deposits grow at some interest rate, month after month.
• The price clock. The thing you want gets more expensive at its own pace.

A goal is only safe when the saving clock outruns the price clock by enough to reach the future price. That is a different target from the one printed on today's price tag.

The inflation impact calculator shows the price clock for any amount and any number of years. The savings calculator shows the saving clock. Used together, they replace a hopeful number with a planned one. The full answers on inflation impact cover the settings in more detail.

The one formula you need

Future cost = today's price × (1 + inflation rate) ^ years

That is all. If you can press a power key on a phone calculator, you can do it. Here are the multipliers for common rates. Multiply today's price by the number.

• At 4% inflation: 3 years is 1.125, 5 years is 1.217, 10 years is 1.480.
• At 6% inflation: 3 years is 1.191, 5 years is 1.338, 10 years is 1.791.
• At 8% inflation: 3 years is 1.260, 5 years is 1.469, 10 years is 2.159.
• At 10% inflation: 3 years is 1.331, 5 years is 1.611, 10 years is 2.594.

Read one row to feel the size of it. At 6%, a ten-year goal costs almost 80% more than the price you see today. A goal priced at ₹5,00,000 becomes about ₹8,95,000. A goal priced at 15,000 dollars becomes about 26,860 dollars.

Short goals suffer less, which is why a three-year plan feels safe and a ten-year plan feels like a gamble. The effect is smaller at 3 years, but it is not zero. Even at 4% over 3 years, a ₹3,00,000 goal becomes ₹3,37,500.

Which inflation rate should you use?

There is no single right rate, and nobody can promise one. Planning needs a sensible range, not a prediction. Use two numbers and see how different the answers are.

A practical way to pick them:

1. Start with the long-run average inflation for your country that you can find in a central bank or statistics office publication. Round it to a whole number.
2. Add 1 or 2 percentage points for the second, cautious case.
3. Run the goal at both rates and plan around the higher one if the budget allows it.

Different goals do not inflate at the same speed. General consumer inflation is an average of thousands of items, and your goal is one item. A few patterns people often meet:

• Education fees have often risen faster than the general average, so a school or college goal deserves the cautious rate.
• Medical costs also tend to rise faster than general prices. A health-related goal should not use the low case.
• Weddings and travel depend on the season, the city and how many guests or trips. Treat these as high-variance goals.
• Vehicles move with model changes, taxes and fuel rules, so a rough average is fine but add a margin.
• Electronics can get cheaper for the same specification, although the model you actually want often costs more than last year's.
• Home deposits follow property prices, which can differ sharply from city to city and from year to year.

If you are unsure, run the goal at 6% and 9%. The gap between the two answers is the room you should keep in your plan. The longer the goal, the wider that gap grows.

The blog on how inflation reduces purchasing power explains why a general rate hides a lot of variation between categories.

A six-step method to set a goal that holds up

Follow these steps in order. Each one takes a few minutes.

1. Write the goal in today's price. Use a real quote, a listing or a brochure. Avoid round guesses. If you do not have a quote, get one before you start.
2. Set the date in months. A date such as "in 5 years" is fine, but you need the number of months for the saving step. Five years is 60 months.
3. Pick two inflation rates. A base rate and a cautious rate, for example 6% and 8%.
4. Inflate the goal. Use the formula above, or the inflation calculator. Write down both results.
5. Choose a return you would be comfortable with. Use the rate your money will realistically earn in the account you will use, after tax if you can. Be conservative.
6. Find the monthly saving. Enter the inflated goal, the months and the return in the savings calculator. Compare the answer with what is left in your budget each month.

If step 6 gives a payment you can carry, you are done. Open a separate account for the goal, set an automatic transfer, and note a review date. If the payment is too high, jump to the section on what to change.

Choosing a return without fooling yourself

The return you assume decides the monthly figure, so it deserves some thought. Overestimating the return is the quiet twin of ignoring inflation.

A few honest rules:

• Use the rate on the actual account. A savings account, a fixed deposit and a recurring deposit pay different rates. The savings calculator lets you test each one.
• If interest is taxed where you live, take the tax off before you plan. A 7% pre-tax rate may be nearer to 5.5% or 6% after tax for some savers.
• If you will invest in market-linked funds, remember that a return assumption is not a promise. The SIP calculator accepts any rate, and the result changes a lot between 8% and 12%.
• For goals under three years, many planners avoid depending on market returns, because a bad year near the date cannot be repaired. Fixed-return products are easier to plan around for short goals.
• For goals beyond seven years, there is more room to include growth assets, but the plan should still work at a lower return than your hope.

One useful number is the real return, which is the return after inflation. At 7% interest and 6% inflation, the real return is about 0.9%. That is the number that tells you how much your money really gains in buying power each year. If the real return is near zero, the old target and the inflated target almost swap places: you must save nearly the full future price out of your own pocket.

The compound interest calculator is a good place to see how time and rate shape the final balance when you change them one at a time.

Three goals, three horizons

Here is how the gap changes with time. All three use a ₹10,00,000 goal in today's prices, 6% inflation, and 7% a year earned on monthly deposits.

• 3 years. Inflated goal: about ₹11,91,000. Monthly saving needed: about ₹29,830. Saving only the old number would need about ₹25,050 a month and fall ₹1,91,000 short.
• 5 years. Inflated goal: about ₹13,38,000. Monthly saving needed: about ₹18,690. Saving only the old number would need about ₹13,970 a month and fall ₹3,38,000 short.
• 10 years. Inflated goal: about ₹17,91,000. Monthly saving needed: about ₹10,350. Saving only the old number would need about ₹5,780 a month and fall ₹7,91,000 short.

Look at the last line. The ten-year plan feels cheap at ₹5,780 a month. The honest monthly figure is nearly double that. The longer the plan, the bigger the share of the final price that comes from inflation, and the more tempting it is to ignore it.

Another way to see it: the shortfall is what the old plan quietly leaves unpaid. On a ten-year goal, almost 44% of the final price is simply the price clock running.

What to change when the monthly saving does not fit

Sometimes the inflated plan asks for more than you can save. That is not a failure of the method. It is information you wanted before, not after. You have five levers.

1. Move the date. Time is the strongest lever because it adds both months of saving and months of compounding. At the same 6% and 7%, a ₹10,00,000 goal in 7 years costs about ₹13,920 a month. That is almost exactly the amount the naive 5-year plan wanted, and the 7-year plan actually reaches the goal.
2. Trim the goal. A cheaper model, a smaller deposit, a shorter course or a second-hand option can cut the target by 10 to 25%. Decide this now, with a clear head.
3. Raise the saving over time. A step-up plan starts lower and rises by a fixed percentage each year as your income grows. The SIP calculator has a step-up option to test this.
4. Split the funding. Save part of the goal and plan to finance the rest with a small loan. Do the loan sum before you commit, because interest has a price too.
5. Open the goal up for review. Some goals change by themselves when circumstances change. A date can move, a priority can fall. Write the review date down so you make that choice on purpose.

Whichever lever you pull, run the numbers again. A new date or a new goal amount produces a new monthly figure.

Raising your saving each year

A flat monthly deposit assumes your income never grows. For most working people, it does. A step-up plan matches the saving to the pay.

Take the 5-year goal above. Instead of ₹18,690 flat, start at about ₹16,100 and raise the deposit by 8% each year. The start figure depends on the return and the step, so run your own version through a calculator. The pattern is what matters. You pay less in year one, when money is tightest, and about ₹21,900 a month in year five, when the pay rises have arrived.

Step-up plans have two risks:

• The raise has to actually happen. If it does not, the last years need a catch-up.
• They back-load the saving, so the early balance is smaller and you earn less interest on it.

Use a step-up when your income is rising and predictable. Use a flat plan when your income is steady or uncertain. Both work if you review them once a year.

The guide on setting a savings goal after inflation has a table you can follow if you prefer to work through the steps with pencil and paper.

Keep the goal money in its own place

A target works better when the money has a home. If the goal money sits in your everyday account, it will leak. A small unplanned spend here and there will not feel like a problem until the date comes.

A simple setup:

• Open a separate savings account or deposit for this goal only. Give it a name.
• Schedule the transfer for the day after payday, not the end of the month.
• Do not link a debit card to that account if you can avoid it.
• Note the target, the date and the review month on the first page of a notebook or in a notes app.

Next, track whether the plan really works. A budget on paper is a promise. A tracker shows what actually happened. The expense tracker lets you log spending and see if the monthly transfer is surviving real life. If it is not, the problem is usually a category of spending, not a lack of discipline, and it can be fixed.

The guide on how much to save each month from your salary is a good companion for fitting several goals into one income.

Long goals and the same mistake

Retirement is the longest goal most people have, and the price clock hurts it the most. A monthly spend of ₹50,000 today may need about ₹89,500 in 10 years at 6%, and about ₹1,60,000 in 20 years. Many people write down a corpus using today's costs and discover decades later that it covers fewer years than they thought.

The method is the same as for a car deposit, only longer. Inflate the monthly need, then work back to the amount you must hold at the start of retirement, then to the monthly saving today. Retirement also has a second inflation problem: spending continues to rise during retirement, so the corpus has to keep up while it is being used.

The article on retirement savings after inflation takes this through with worked numbers. If you are looking at a long goal, read it after this one.

Worked example from start to finish

Meera wants to pay a ₹6,00,000 course fee in 4 years. She first sizes the plan from today's fee, then repeats it with inflation. The steps are below.

Quick reference: inflate a goal in your head

The rule of 72 gives a rough check. Divide 72 by the inflation rate to find the years needed for prices to double. At 6%, prices double in about 12 years. At 8%, about 9 years. At 3%, about 24 years.

So a goal 12 years away that costs ₹5,00,000 today will cost roughly ₹10,00,000 at 6% inflation. A goal 6 years away will cost roughly 40% more, about ₹7,00,000. Use this as a sanity check, then run the exact numbers.

Frequently asked questions