Built by a banker, 19 years inside the system · the story →

Small money decisions compound into a 37x difference.

You skip the boring money stuff. Almost everyone does. The endowment nobody made you question. The SIP set once and forgotten. Each looks too small to bother with. Together, over a working life, they decide whether you retire rich or just tired. Run the number before you sign the next one. Free, ten seconds, nothing to log in to.

NEW · THE ART OF PRUDENCEA 1647 field manual on power, reputation and prudence, rebuilt for your workplace.Gracián's 300 maxims: his words, a plain reading, the practical moves, and the honest trade-off every time. Publishing in batches, free to read. Open the maxims →
…and all 20 everyday calculators on one page, done cleanly →

Where are you on the money milestones?

A 2-minute self-check that places you on a 9-rung ladder, from your first ₹1 lakh to financial independence, and names the one move that matters most at your stage.

Investments & growth

See how compounding builds wealth over time — and how much you need to invest to hit your goals.

SIP Calculator

Monthly Systematic Investment Plan into mutual funds.
%
yrs
Estimated value
InvestedReturns
Total invested
Wealth gained
Maturity value

Step-up SIP Calculator

Increase your SIP every year as your income grows.
%
%
yrs
Estimated value
InvestedReturns
Total invested
Wealth gained
Final-year monthly SIP
Maturity value
A step-up SIP can dramatically beat a flat SIP — raising your contribution with your salary keeps your investing rate constant in real terms.

Lumpsum Calculator

A one-time investment compounding over time.
%
yrs
Estimated value
InvestedReturns
Invested
Wealth gained
Maturity value

CAGR / Return Calculator

Compound Annual Growth Rate between two values.
yrs
CAGR
Compound annual growth rate
Absolute return
Total gain
Times your money grew
CAGR smooths returns into a single yearly rate. Real investments rarely grow steadily — for irregular cash flows use XIRR instead.

Goal Planner multi-goal

Plan several goals at once — edit any cell, add or remove goals.
GoalTarget ₹YrsRet %
Each goal gets its own SIP at its own expected return. Short-horizon goals should use lower, safer return assumptions; long-horizon goals can use equity-like rates.
Total monthly SIP for all goals
Combined target
You'll invest

Inflation Calculator

What things will cost — and what your money will be worth.
%
yrs
Future cost of the same thing
Today's cost
Extra needed due to inflation
What today's ₹ will be worth then
India's long-run retail inflation (CPI) has averaged roughly 5–6%. This is why money left idle in a savings account quietly loses purchasing power.

Asset Allocator equity · debt · gold

A starting split across asset classes, tuned to your age and risk appetite.
yrs
A classic rule of thumb is "100 minus your age" in equity. This adjusts that for your risk comfort and adds a small gold allocation. Rebalance about once a year.
Suggested allocation
in equity
The split
EquityDebtGold
Equity
Debt
Gold
Equity (stocks / equity funds) for long-term growth, debt (PPF, EPF, debt funds, FDs) to cushion falls, a little gold as a hedge. This is a guideline, not advice.

Government & bank savings

Low-risk schemes with current rates pre-filled. Rates change quarterly — adjust as needed.

PPF Calculator 7.1% current

Public Provident Fund — 15-year lock-in, tax-free (EEE).
%
yrs
Max ₹1.5 lakh/year. Maturity at 15 years; extendable in 5-year blocks. Interest & maturity fully tax-free.
Maturity amount
InvestedInterest
Total invested
Total interest

EPF Calculator 8.25% current

Employees' Provident Fund corpus at retirement.
yrs
yrs
%
%
EPF corpus at retirement
ContributionsInterest
Employee (12%) + Employer (3.67%)
Interest earned
Monthly contribution (start)
Simplified: employer's 3.67% goes to EPF (the rest funds EPS pension). Assumes steady salary growth and constant interest.

Fixed Deposit Calculator

Compound interest on a bank/company FD.
%
yrs
Maturity amount
PrincipalInterest
Principal
Interest earned
FD interest is fully taxable at your slab rate. TDS applies if interest exceeds ₹50,000 (₹1 lakh for seniors) a year.

Recurring Deposit Calculator

Fixed monthly deposit, compounded quarterly.
%
months
Maturity amount
DepositedInterest
Total deposited
Interest earned

Loans

Work out your EMI, then play with prepayments to see how much interest you can crush.

Loan EMI Calculator

Home, car or personal loan equated monthly instalment.
%
yrs
Monthly EMI
PrincipalInterest
Principal
Total interest
Total payable

Yearly amortization

How each year's EMIs split between principal and interest.

Loan Prepayment Player scenario

Add extra payments and watch your interest & tenure shrink.
%
yrs

Prepayment scenario

yr
Debt-free in
Interest saved
Time saved
Your EMI (unchanged)
Original tenure
Interest — without prepayment
Interest — with prepayment
Total extra you'll pay in
Prepayments go straight to principal, so early extra payments save the most interest. On home loans, check for any prepayment terms (floating-rate loans usually have none).

Retirement

Find the corpus you'll need to retire comfortably in India — and how to build it.

Retirement Planner

The corpus you need, and the SIP to build it.
yrs
yrs
%
yrs
%
%
Corpus needed at retirement
Monthly expense at retirement
Years in retirement
Your current savings will grow to
Gap to fund
SIP needed from today
Uses the inflation-adjusted (real) return during retirement so withdrawals keep pace with rising costs.

NPS Calculator

National Pension System — corpus & monthly pension.
yrs
yrs
%
%
%
Total corpus at 60
InvestedReturns
Total invested
Lump sum withdrawal (tax-free)
Amount put into annuity
Estimated monthly pension
At least 40% of the NPS corpus must buy an annuity (pension). Extra deduction up to ₹50,000 under 80CCD(1B) in the old regime.

SWP Calculator withdrawals

Draw a monthly income from a corpus while the rest stays invested.
%
%
yrs
Balance after 25 years
Total withdrawn
Starting withdrawal rate iYear-one withdrawal as a % of the corpus. This is the figure safe-withdrawal-rate research is about.
Safe start for India (~3.5%)
Corpus lasts

Insurance

Check the real return of a traditional/endowment policy — then size the term cover you actually need.

Endowment / Traditional Plan IRR & surrender

The real return inside endowment, money-back & guaranteed-income plans — for a new policy or one you already hold.
yrs
yrs
%
Actual return (IRR)
Total premiums paid
Total you receive
— of which, maturity
Maturity tax status

If you invested the same premiums instead

Corpus at your chosen return
You'd be richer by

Term Cover Needed

A rough estimate of the life cover your family would need.
yrs
Term cover you should buy
Income replacement
+ Loans & debts
− Existing savings
− Existing cover
Rule-of-thumb (15× income)
Pure term insurance is cheap — a healthy 30-year-old can often get ₹1 crore cover for roughly ₹700–1,200 a month. Buy term, invest the rest separately.

Budget & emergency fund

Plan where every rupee goes each month, then size the safety net that keeps your investments untouched.

Budget Creator 50 / 30 / 20

Enter your take-home income, then list where it goes. Tag each item Need, Want or Invest.
Expense / allocationType₹ / month
Monthly surplus (left to save)
Where your income goes
NeedsWantsInvestSurplus
Needs
Wants
Investments
Total spent
Savings rate

50 / 30 / 20 health check

Emergency Fund Calculator

The classic 3-month (or more) cushion for job loss, medical bills and surprises.
months
months
Emergency fund target
Progress to target
You're covered for now
3-month target
6-month target
Still to save
Save per month to get there
Keep this money safe and instant — a sweep-in FD or a liquid fund — not in equity. Its job is to be there on a bad day, not to grow.

Learn the basics

Opinionated reads on the decisions the tools represent, quick guides, and a glossary to look anything up.

The thinking behind the tools

Short reads on the decisions the calculators represent. Opinions, not definitions.

"Guaranteed" is the most expensive word in Indian financePairs with: the Endowment reality-check

Someone you trusted sold you the plan. A relative, a bank officer, the agent who comes every Diwali. It promised to do two things at once: protect your family and grow your money. One premium, both boxes ticked. It felt like the responsible thing to do.

Here is the problem. A product built to do two jobs does neither one well.

The protection is thin: a few lakh of cover for a premium that would have bought you a crore as pure term insurance. And the investment inside it, once you run it honestly through an IRR, usually lands somewhere between 4 and 6%. You have locked decades of your money into a return that barely outpaces inflation, and you did it because of one word printed on the brochure.

The fix is to stop asking one product to do two jobs. Buy a pure term plan for protection; it is startlingly cheap precisely because it does only one thing. Then take the premium you were overpaying and put it where it can actually compound: an index fund, PPF, whatever fits you.

It works because insurance priced as insurance is cheap, an investment freed from a 5% wrapper grows at market rates, and once the two are separate you can change either one without disturbing the other.

In nineteen years inside a bank I have sat across from people holding three of these at once, each one sold as safety. If you are one of them, you have not ruined anything. Run the policy through the calculator first. A plan twelve years in is sometimes worth carrying to maturity, and sometimes the surrender value plus redirected premiums still wins. Let the number decide, not the guilt.

"Guaranteed" tells you the return is certain. It does not tell you the return is good.

A low risk appetite isn't free. Your seventies pay the bill.Pairs with: the Asset Allocator

You think of yourself as a careful person. Your money sits in fixed deposits, a little in PPF, and you sleep well because the number never falls. You believe you are avoiding risk.

You are not avoiding it. You are moving it.

Money that grows at 6 to 7% before tax, against 5 to 6% inflation, is standing almost perfectly still. The risk you sidestepped in your forties, a bad market year you would have had to sit through, you have handed to yourself at seventy instead, in the shape of a corpus too small to last. A falling portfolio is a risk you can see and wait out. An undersized retirement is a risk you will not see until the day you can no longer do anything about it.

The fix begins with separating two things people treat as one. Risk appetite is how much volatility your stomach can take. Risk capacity is how much your situation can actually absorb. You can raise your capacity on purpose: an emergency fund and good health insurance mean a market dip never forces you to sell at the bottom. And you can raise your appetite too, because most of what people call low appetite is not temperament, it is unfamiliarity. Then you put money where it can outrun inflation over a horizon long enough for the volatility to wash out.

It works because equity's swings are short-term noise on a long-term signal. Over a working life, the danger was never a bad year. It was a flat decade you chose on purpose.

This is not a dare to go all in. It is permission to stop mistaking stillness for safety. You are allowed to keep a low risk appetite. Just choose it with open eyes, knowing exactly who is being handed the bill.

Avoiding equity does not avoid risk. It posts the risk forward, to the age when you have the least power to answer it.

A flat SIP is a pay cut you give yourself every yearPairs with: the Step-up SIP

You did the hard part. You started the SIP, automated it, and stopped checking it. Five thousand a month, every month, for years. Discipline like that is rarer than people admit, and you should be proud of it.

But the number you set on day one is the number working against you now.

Your salary has climbed since then. Your rent, your groceries, the holidays you take, all of it has climbed too. The one thing that stayed frozen is the amount you put toward your own future. A SIP that never moves is not steady. In real terms it shrinks a little every single year, because the rupee keeps buying less while your income keeps earning more. You are sending a smaller and smaller slice of yourself forward in time.

The fix is to tie the SIP to your income instead of to a figure you picked once and forgot. Step it up by ten percent a year, or simply raise it the month your salary does. Catch the increment on its way in, before a slightly nicer life absorbs it, and route a part of it into the SIP. You will barely notice it in your spending. You will notice it enormously in the corpus.

It works because the earliest rupees compound the longest, and a step-up pushes more money into exactly those early years. A flat 5,000 and a stepped-up 5,000 begin identical and end a continent apart. The difference is not effort or income. It is one percentage you set once and let your own salary cycle carry.

You do not need to earn more to begin. You need your next raise to not vanish into a lifestyle you will not even remember. That is the whole move.

A SIP that never grows is a SIP slowly shrinking. Give it the same raise you gave yourself.

The debt you could kill, and choose to keepPairs with: the Loan Prepayment player

You have some money sitting idle and a home loan running for another eighteen years. The clever advice says don't touch the loan: it's cheap, equity returns more, there's a tax benefit, the arbitrage is in your favour. So you leave it alone and feel sharp about it.

The spreadsheet agrees with you. Your nervous system does not, and on this one it is worth listening to.

The arbitrage argument is true on paper and shaky in the life you actually live. It assumes you will invest the difference with perfect discipline for eighteen unbroken years, that the market returns arrive on schedule, and that a loan hanging over you costs nothing beyond its interest. It costs far more than interest. It is a standing claim on your future income. It is the reason you cannot take the pay cut, leave the job that drains you, or fund the bet on yourself. Debt is leverage on your salary, and leverage runs in both directions.

So treat prepayment as buying freedom, not only as chasing a return. A modest extra amount each month, paid early in the loan when almost the entire EMI is interest, strips years off the tenure and a genuinely shocking pile of interest along with them. Run your own loan through the player and watch what just one extra EMI a year does to the total. Then decide with both the number and the feeling sitting in front of you.

It works because in the early years your EMI is almost all interest and barely any principal. Every rupee of prepayment in that window goes straight at the principal and cancels all the future interest that principal would have generated for the bank. The earlier the rupee lands, the more years it kills.

This is not a case for hurling every spare rupee at the loan while your investments starve. Keep investing. But the decision was never purely mathematical. A guaranteed, stress-free return equal to your loan rate is worth more than any spreadsheet will ever score it. One honest caveat: if you still claim the Section 24(b) deduction on your home-loan interest, prepaying gives it up, so your real return is the loan rate minus that break. On the new tax regime, that break is already gone.

Some returns are paid in rupees. Killing a debt early is paid in sleep.

Your emergency fund is allowed to be lazyPairs with: the Emergency Fund calculator

You built the fund, and then it started to bother you. All that money sitting in a savings account at 3%, doing nothing, while you knew better. So you put it to work: into equity, or a five-year FD, or a debt fund with an exit load. You made your safety net earn its keep.

That is the mistake, and it only reveals itself on the worst day.

An emergency fund has exactly one job: to be there, in full, the moment everything else goes wrong. A job lost. A hospital admission at two in the morning. A repair that cannot wait for the market to recover. On that day, money that is locked, or down 15%, or three working days away from settling, forces you to borrow, or to sell your real investments at the worst possible time.

So keep it boring and keep it instant. A sweep-in savings account is built for exactly this: anything above a threshold auto-converts into a deposit and breaks back the instant you withdraw, so you get near-FD returns with savings-account access. Not a debt fund. Not a tax-saver. Nothing with a lock or a settlement delay. Three months of essential expenses if your income is steady, six if it is not.

It works because the entire worth of this money is its certainty. The day you need it, you need all of it, at once, with no phone calls and no forms. A sweep account is the one place that gives you both the return and the access.

This money is allowed to earn almost nothing. Its return is not measured in percent. It is measured in the number of nights you sleep without doing the math, and in never having to make your worst financial decision on your worst personal day.

An emergency fund's job is to be there, not to grow.

Frugality makes you bitter. Minimalism makes you lighter.Pairs with: the Budget Creator

I know both ends of this one, because I lived them.

First I was a mindless spender. Then, frightened by that, I overcorrected, hard. For a few years I became aggressively frugal. I counted every rupee out loud. I could turn a small, harmless expense into a debate. I treated a low spend as a kind of moral victory, and I made the people closest to me smaller and more anxious in the process. I told myself it was discipline. It was just misery with a spreadsheet.

Here is what took me years to see: frugality, pursued for its own sake, is a tax on your peace. Every saved rupee arrives with a little resentment attached. You can win the spreadsheet and lose the life.

What changed wasn't a tighter budget. It was switching from frugality to minimalism, which looks identical from the outside and is the opposite on the inside. Frugality asks, what can I cut? Minimalism asks, what did I never need in the first place? One is deprivation. The other is clarity.

So now I keep a high savings rate, and the money that's left, I spend freely and without guilt. I tip. I round the auto fare up to the next ten. I buy the good thing I'll use for years. None of it dents the plan, and all of it makes the saving feel like a choice instead of a sentence.

It works because when your savings come from wanting less, there is nothing left to resent. Lower spending becomes a side effect of clarity, not the goal you grit your teeth toward. You end up saving more and enjoying it more, the exact thing frugality promised and never delivered.

You don't have to choose between a healthy balance and a warm life. The bitterness was never the price of building wealth. It was only the price of doing it the joyless way.

Frugality counts what you spend. Minimalism questions what you want. Only one of them sets you free.

Money is the only wealth you can outsourcePairs with: the automations on this site

We treat money as if it's the whole game. We track it, optimise it, lie awake over it, and assume the rest of life will sort itself out once the number is big enough.

It won't. And here is the part nobody frames clearly.

You hold at least five kinds of wealth: financial, physical, mental, emotional, relational. Money is the odd one out. It is the only one you can hand to someone else to grow. A fund manager compounds your money while you sleep. But nobody can compound your health for you. No advisor keeps your marriage warm, or builds the friendships you'll want at sixty, or does your thinking. Those four grow only if you show up, in person, with your actual hours.

Which makes the rational move obvious: outsource the wealth that can be outsourced, and spend your own time on the four that can't. And it's the exact move most people invert. They pour their best years and sharpest attention into the one form of wealth a machine could have handled, picking the stocks, timing the market, chasing the extra percent, and let the four that needed them personally thin out.

I know that inversion from the inside. I managed my own stocks for years and did well at it, until I added up what it was costing me in time and attention and realised a simple index fund would have done nearly the same job while I got my life back.

That's what the automations on this site are for. SIPs, index funds, sweep accounts exist to make your financial wealth low-maintenance, so it stops stealing the hours the other four are asking for.

This isn't an argument to care about money less. It's an argument to care about it efficiently, so it does its job in the background and gets out of the way of the life it was supposed to serve.

Outsource the one wealth a stranger can grow. Spend yourself on the four that only you can.

Abundance isn't the size of the numberPairs with: the Retirement & Goal planners

We're taught that abundance is a quantity. A figure in the bank. A corpus. Some number that will finally mean enough. So we chase it.

And the strange thing everyone discovers, if they're honest, is that the figure keeps moving. The crore that was going to be enough becomes the new floor. The number never once says stop.

That's because abundance was never a quantity to begin with. It's knowing who you are, what you value, and what your money is actually for. A person clear on those three can feel genuinely abundant at a figure that would frighten someone who isn't, and a person unclear on them stays anxious at any figure, because no amount can answer a question you've never sat down to ask.

This is not a case for wanting less wealth. Build it, seriously, and with a high savings rate. But decide, in parallel, what it is in service of. Money is a superb servant and a miserable master, and the entire point of financial independence is not more. It's the freedom to live by your own values, to work because you choose to, and to say no when you need to.

It works because a goal with a purpose has a finish line. "Enough to live by my values and protect the people I love" is a number you can actually reach. "More" is not. It retreats at exactly the speed you advance on it.

You're allowed to want both: a portfolio that keeps growing and a mind that's already settled. They aren't in tension. The settled mind is the thing that tells the growing portfolio when it has finally done its job.

The number tells you how much you have. Only you can decide how much is enough.

Money glossary

Why 37xBetter exists

The person behind the tools, and the bias they carry.

I didn't start out wise about money. I started out as a mindless spender.

Then I overcorrected. Hard.

For a few years I became the kind of frugal that counts every rupee out loud, the person who can turn a small, harmless expense into a debate, who mistakes a low spend for a life well lived. I told myself it was discipline. What it actually did was make me, and the people closest to me, smaller and more anxious. Frugality, pushed that far, doesn't make you rich. It makes you bitter.

What pulled me out wasn't a better budget. It was a realisation: I had been optimising the number and losing the life around it.

I learned that same lesson twice, in two different rooms.

The first was investing. For years I picked my own stocks, and I did fairly well at it. But one day I added up the hours, the tracking, the reading, the low-grade worrying, against the extra return over a plain index fund. The excess didn't justify the effort. So I moved to mutual funds, automated everything, and got back the thing stock-picking had been charging me: my time, my attention, my career. No investment return compounds like the life you free up to live.

The second was spending. I stopped being frugal and started being deliberate. Today I keep a high savings rate, and everything left over, I spend without guilt. I tip. I round the auto fare up to the next ten. I started pampering the people I'd once lectured. Minimalism, it turns out, doesn't deprive you. It makes you lighter.

That's the whole idea behind this site, in one line: money is only one kind of wealth, and it's the only one you can outsource. Your health, your relationships, your peace of mind, no fund manager builds those for you. Financial independence matters enormously, not so you can stop working, but so you can work because you choose to, and say no when you need to. Early retirement is optional. Independence is not.

So 37xBetter carries a simple bias. It won't help you chase the last basis point. It will show you the decisions that actually move your life: the policy nobody made you question, the SIP you set once and forgot, the loan you keep overpaying, and then get out of your way.

Over time this site has grown past money, because the problem is bigger than money. I think of wealth as five accounts: money, health, relationships, peace of mind, and your career. Money is the only one you can outsource. And nothing compounds like the career that funds the other four. Mid-career growth is rarely about one more certificate. It is about prudence: reading a room, working with a difficult boss, guarding your name, leaving at the right time. That is why The Art of Prudence lives here, next to the SIP calculator: Baltasar Gracián's 300 maxims from 1647, rebuilt in plain language for the working professional, free like everything else. The tools handle the one wealth you can outsource. The maxims train the ones you cannot.

The name is the promise. Improve 1% a day and a year compounds it to 37x. Not through heroics: through small, boring, correct decisions, repeated.

It's free. There's nothing to log into, and nothing here is for sale. I've spent close to two decades inside the banking system, and I've watched good, careful people get sold bad products by someone they trusted. This is my attempt to even the odds, a little.

I'm still walking my own road to financial independence. These are the tools I built for myself first.

Open the Art of Prudence →

All calculators

Every tool has a point of view: the thing nobody tells you until you run the number. Click a box to open it.

Invest
Save
Loan
Retire
Insurance
Budget
Free guides & self-tests