What happens when inflation rises too much
The answer
High inflation does not destroy money in the country as a whole. It moves it, from anybody owed a fixed amount of money to anybody who owes one. Savers, pensioners and bondholders lose. Borrowers and governments gain. Above roughly 50% a month, the transfer becomes so fast that people stop using the currency at all.
Why this costs you money
Look at 2 people on the same day.
The first has ₹10 lakh in a fixed deposit paying 7%. The second has a ₹10 lakh home loan at 9%. Inflation is 7%.
The saver earns ₹70,000 in interest, pays tax on all of it, and ends the year able to buy slightly less than at the start. The borrower's loan balance is unchanged in rupees, but a year of 7% inflation has cut what those rupees are worth by about 7%. The salary he repays it from has probably risen. His debt got smaller without him paying anything extra.
Nothing dishonest happened. The saver signed a contract that fixed a number of rupees, and the value of a rupee changed underneath it.
Now the part that actually empties accounts. Use the rule of 72: divide 72 by the inflation rate and you get the number of years for prices to double.
| Inflation rate | Years for prices to double | What ₹100 is worth after 20 years |
|---|---|---|
| 2% | 36 | ₹67 |
| 4% | 18 | ₹46 |
| 7% | 10 | ₹26 |
| 10% | 7 | ₹15 |
Somebody who retired 20 years ago on a fixed pension, in a country averaging 7% inflation, is living on about a quarter of what they retired on. Their bank balance never fell. Their life did.
How it works
Inflation does 5 separate things. They are usually described as one thing, which is why the damage is underestimated.
1. It erodes purchasing power. This is the arithmetic above. It applies to cash, to current accounts, and to anything paying a fixed rate below inflation.
2. It destroys the value of fixed claims. Any contract promising a fixed number of rupees or dollars in the future — a bond, a deposit, a pension, an insurance sum assured, a fixed salary — loses value at the inflation rate. This is a transfer, not a loss to the country. Somebody on the other side of each contract gains exactly what the holder loses, and that somebody is usually a borrower. The largest borrower in any country is its government.
3. It creates uncertainty. A business that cannot forecast next year's input costs shortens its contracts, holds more inventory, and demands a higher return before investing. That reduces investment even at inflation rates far below crisis level.
4. It falls hardest on the poor. Two mechanical reasons. Food is a much larger share of a low-income household's budget, and food is usually what rises fastest in an inflation episode. And poor households hold more of their wealth as cash, the asset that loses at exactly the inflation rate.
5. Past a point, it feeds itself. When people expect prices to rise, they buy today rather than tomorrow, and workers demand higher wages in advance. Both raise prices further. The traditional threshold for hyperinflation, set by the economist Phillip Cagan in 1956, is 50% inflation per month. At that speed the currency stops being a way to store value, then stops being a way to price things.
What it tells you, and what it does not
High inflation does not mean a country is getting poorer. Output can grow while prices rise quickly. Inflation is about the measuring unit, not the goods.
It does not affect everybody equally. It is a transfer with winners. If you hold a large fixed-rate home loan and few financial savings, an unexpected burst of inflation makes you better off. Say that plainly, because most writing on this subject pretends there are only victims.
Low is not the same as zero. Falling prices — deflation — are also damaging. People delay purchases, debts grow heavier in real terms, and interest rates cannot fall below zero by much. That is why targets are 2% or 4%, not 0%.
Expected inflation is much less damaging than unexpected inflation. If everybody knows prices will rise 6%, contracts and wages are written with 6% in them, and the transfer largely does not happen. The damage comes from surprise.
The decision rule
Judge every place you keep money by its real rate, not its stated rate.
Real rate = the rate the instrument pays, after tax, minus your own inflation rate.
If the real rate is negative and you intend to hold for more than 2 years, you are paying for the privilege of holding that instrument. That is sometimes the correct decision, for money you may need next month. It is never the correct decision for money you will not touch for 10 years.
The words "after tax" are doing real work in that rule, and the India section explains why.
Try this now
Five minutes with your own bank app. You will finish knowing the real return on every rupee or dollar of cash you own.
- List every place you hold money that pays a fixed or near-fixed rate: savings account, each fixed deposit or certificate of deposit, recurring deposit, any bond, any small savings scheme. Write down the balance and the stated rate for each. The rate is on the deposit receipt or in the account details screen.
- Multiply each rate by (1 − your tax rate) to get the after-tax rate. If you are in a 30% slab, a 7% deposit pays 4.9% after tax.
- Subtract your personal inflation rate — the number you calculated in the previous article. If you did not calculate it, use the latest headline CPI print for now, and mark it as a placeholder.
- Write the answer next to each balance. That column is your real return.
- Add up every balance where the real return is negative. That total is the amount of your money currently shrinking.
What you should see. In most years, and for most people in a high tax slab, the savings account is deeply negative and the fixed deposits are close to zero or slightly negative. This is normal. It is also the reason a plan built on "I will keep it safe in the bank" quietly fails over 20 years.
Then do one more line. Take the total from step 5, divide 72 by your personal inflation rate, and you have the number of years in which that money loses half its purchasing power while sitting still.
Three real cases
1. Germany, November 1923 — the end state The German mark had traded at about 4.2 to the US dollar in 1914. By November 1923 one US dollar was worth 4,210,500,000,000 marks. A loaf of bread in Berlin that cost about 160 marks at the end of 1922 cost 200 billion marks by late
- Wages were paid twice a day so workers could spend them before they lost
value. On 16 November 1923 a new currency, the Rentenmark, was introduced and 12 zeros were removed from prices. Anybody holding German government bonds or bank savings from 1918 held nothing.
2. Zimbabwe, November 2008 to April 2009 — the modern version Monthly inflation in Zimbabwe peaked in mid-November 2008 at an estimated 79.6 billion percent, on the Hanke and Kwok calculation. In January 2009 the Reserve Bank of Zimbabwe announced a 100 trillion dollar note. In April 2009 the government stopped printing the currency altogether and allowed foreign currencies to be used instead. The country did not run out of goods first. It ran out of a usable unit of account.
3. United States, 2021 to 2022 — the ordinary version, and the expensive one Headline CPI reached 9.1% in the 12 months to June 2022, the largest increase in 40 years. Over that same stretch the average interest rate on US savings accounts stayed close to zero. A household with $50,000 in a savings account paying almost nothing, through a year of 9.1% inflation, lost roughly $4,500 of purchasing power without a single line appearing on any statement. No hyperinflation, no collapse, no headlines about their account. Just a transfer, completed silently.
The question that resolves it
A novice asks: is inflation high?
An expert asks: is my real rate negative, and for how long will it stay there?
A 9% inflation rate with a 10% deposit rate is far less damaging to a saver than a 4% inflation rate with a 3% deposit rate. The headline is the wrong number to be frightened of. The gap is the right one.
What would make this wrong
If every contract in an economy were indexed to inflation, high inflation would be an inconvenience rather than a transfer. Some are: United States Social Security payments carry an annual cost-of-living adjustment tied to CPI, and Indian government employees receive Dearness Allowance revised twice a year. Where indexation is complete, the harm largely disappears. That is the honest test of this article, and it points to the real mechanism — the damage lives in the contracts that are not indexed.
Two limits. Moderate inflation is not a disaster and is not on a path to hyperinflation — every hyperinflation in history involved a government financing a large deficit by creating money, usually after losing a war, a revenue base or a currency's credibility. It is a different event, not the far end of a scale that starts at 5%. And this article treats inflation as something that happens to a saver. For a working person the wage side matters just as much, and in some episodes wages keep up. Check both sides before concluding you were harmed.
In India
Three features make the real rate worse than it looks.
Interest is taxed at your slab rate, on the nominal amount. A 7% fixed deposit in the 30% slab pays 4.9% after tax. There is no adjustment for inflation anywhere in that calculation. You pay tax on a gain that may not exist in real terms.
Small savings rates are set administratively. PPF, the Senior Citizen Savings Scheme, the National Savings Certificate and the Sukanya Samriddhi account have rates reviewed quarterly by the government, not by a market. They are usually above bank deposit rates and are sometimes above inflation, but the decision is a policy one and can change.
Inflation-linked instruments are effectively unavailable to retail investors. The RBI issued Inflation Indexed National Savings Securities (Cumulative) to households in December 2013. The scheme drew little interest and was discontinued. There is no widely available Indian equivalent of an inflation-linked retail bond today.
On capital gains, the Union Budget of July 2024 removed indexation for most long-term capital assets and set the long-term rate at 12.5%, with a grandfathering option for immovable property acquired before 23 July 2024 . Indexation was the mechanism that adjusted your purchase price for inflation before taxing the gain. Without it, part of what you pay tax on is inflation rather than profit.
In the United States
The United States gives retail savers 2 instruments that pay a rate defined by inflation itself.
Treasury Inflation-Protected Securities (TIPS) are government bonds whose principal is adjusted by CPI. You are quoted a real yield, and inflation is added on top. A TIPS yielding 2% real pays 2% plus whatever CPI does.
Series I savings bonds are bought directly from TreasuryDirect and pay a fixed rate plus a rate reset twice a year to match CPI inflation. There is an annual purchase limit per person.
Beyond those, US federal income tax brackets and the standard deduction are indexed to inflation each year, which prevents a household from being pushed into a higher bracket by inflation alone. Social Security payments carry an annual cost-of-living adjustment.
Interest income is still taxed as ordinary income, and the inflation component of a TIPS adjustment is taxable in the year it accrues even though you do not receive it until maturity. So the protection is real but not complete.
Where they differ, and what that tells you
The gap is not in the inflation rate. It is in whether an ordinary person can buy protection from it.
An American saver who wants a guaranteed positive real return can buy TIPS or I bonds in an afternoon, from the government, at any size. An Indian saver cannot. The nearest options are equity, real assets, or accepting a nominal rate and hoping it beats inflation.
Add the tax treatment and the gap widens. India taxes nominal interest at slab rates with no inflation adjustment, and since 2024 taxes most long-term capital gains without indexation. The United States indexes its tax brackets annually and offers an explicitly inflation-linked bond.
What that tells you is a portfolio instruction, not a complaint. In the United States, the defence against inflation can be a bond. In India, the defence against inflation has to come from assets whose earnings rise with prices — which in practice means equity and, to a degree, property. That is not a preference or an opinion about which asset is better. It is a consequence of which instruments exist in each country. An Indian investor copying an American allocation that leans on inflation-linked bonds is copying an instrument they cannot buy.
Carry this
- Inflation is a transfer from lenders to borrowers, and you are always on one side of it.
- Real rate = rate, minus tax, minus your inflation. Everything else is decoration.
- 72 divided by the inflation rate is how many years your idle money takes to lose half its power.