01
Enter your investment
Type the lump sum you will invest. KVP has a ₹1,000 minimum and no maximum.
KVP Calculator
See how fast Kisan Vikas Patra doubles your money at 7.5%.
Updated Reviewed by Sajid Hussain· Editor
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Your numbers
KVP bills sellers in Indian Rupee (INR), so this calculator works in INR — not your selected US Dollar ($). Every figure below matches your real KVP statement. Localised USD marketplaces are coming soon.
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Last updated
June 14, 2026
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Region-specific
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India Savings Tool
What Is a KVP Calculator?
A KVP calculator shows how long Kisan Vikas Patra takes to double your money and what you get at maturity — using your investment and the 7.5% rate that sets the 115-month doubling period.
KVP is a doubling scheme. The government fixes a doubling period tied to the interest rate, set so the maturity equals exactly twice your investment. At 7.5%, that period is 115 months — 9 years and 7 months — and ₹1 lakh becomes ₹2 lakh.
The maturity is always double, whatever the amount. Because the scheme guarantees doubling, the interest you earn equals your original investment — a 100% return over the term. The calculator shows the doubling period, the maturity value, and the interest.
The "doubling" is before tax and inflation. KVP gives no 80C deduction, and the interest is taxed at your slab (no TDS — you declare it). After a 30% slab the real return is about 5.6%, and against ~6% inflation it barely grows in real terms. Set your slab and the calculator shows the post-tax maturity and its worth in today's money.
It suits parking a large sum safely. With no upper limit and a sovereign guarantee, KVP is popular for growing a lump sum without market risk and without a tax goal. The calculator shows exactly how long that growth takes — and what it is really worth after tax.
Quick facts
- Type
- Lump-sum doubling scheme
- Rate (FY 2025-26)
- 7.5% (compounded yearly)
- Doubling period
- 115 months (9y 7m)
- Limit
- ₹1,000 min · no maximum
- Tax
- No 80C · interest taxable
- Free to use
- No sign-up needed
How It Works
Calculate Your KVP Doubling in Two Steps
02
Set the interest rate
The rate defaults to the current 7.5%. The rate decides the doubling period and is fixed when you buy.
03
See the doubling period
See how long your money takes to double, the maturity value (twice your investment), and the interest earned.
Steps to use the KVP Calculator: Enter your investment, Set the interest rate, See the doubling period.
The Formula
How KVP Doubling Is Worked Out
01
Doubling period
Months = 12 × ln(2) ÷ ln(1 + rate)
The doubling period is the time for money to double at the given rate, compounded annually. The government rounds it to a whole number of months and fixes it for the certificate.
Example: 12 × 0.6931 ÷ ln(1.075) = 115 months
02
Maturity value
Maturity = 2 × Investment
KVP is designed so the maturity equals exactly twice your investment at the doubling period — whatever the amount you put in.
Example: 2 × ₹1,00,000 = ₹2,00,000
03
Interest & return
Interest = Investment · Return = 100%
Because the money doubles, the interest you earn equals your original investment — a total return of 100% over the term.
Example: ₹1,00,000 interest on ₹1,00,000 invested
04
Post-tax & real return
After-tax = maturity − interest × slab% × 1.04
The interest (= your investment) is taxed at the slab + 4% cess, so the post-tax CAGR is below 7.5%. The post-tax maturity is then discounted for inflation to show its real worth.
Example: 30% slab → ~5.6% post-tax; vs 6% inflation → near-zero real
Worked Example
Step-by-Step Walkthrough (₹1 lakh at 7.5%)
Currency note: the example below uses a benchmark scenario priced in Indian Rupee (INR). Values are converted to US Dollar (USD) at the latest exchange rate so you can compare against your own numbers.
Scenario
An investor putting $100,000.00 into Kisan Vikas Patra at 7.5%.
1
Step 1 · Doubling period
At 7.5% compounded yearly, money doubles in a fixed government-set period.
9 years 7 months (115 months)
2
Step 2 · Maturity value
KVP pays exactly twice your investment at the doubling period.
Maturity = $200,000.00
3
Step 3 · Interest earned
The interest equals your original investment — a 100% return.
Interest = $100,000.00
The takeaway
A $100,000.00 KVP doubles to $200,000.00 in 9 years 7 months at 7.5%, earning $100,000.00 of interest. It is a simple, government-guaranteed way to double a lump sum safely — with no upper limit, but no 80C benefit and taxable interest.
By investment
KVP Maturity by Investment (7.5%, 115 months)
| Metric | Poor | Average | Good | Excellent |
|---|---|---|---|---|
Maturity value Calcrux projection · 7.5% | ₹10,000 → ₹20,000 | ₹1L → ₹2L | ₹5L → ₹10L | ₹10L → ₹20L |
Interest earned Calcrux projection · 7.5% | ₹10,000 | ₹1L | ₹5L | ₹10L |
Time to double India Post · 7.5% rate | 115 months | 115 months | 115 months | 115 months |
Comparison
Calcrux vs Groww vs Bank Calculators
| Feature | Calcrux (Free) | Groww | Bank site |
|---|---|---|---|
| Doubling period in years & months | |||
| Maturity value & interest | |||
| Post-tax maturity at your slab | |||
| Real return after inflation | |||
| Flags it is NOT 80C-eligible | |||
| Free, no sign-up required |
Common Mistakes
KVP Mistakes to Avoid
Expecting an 80C tax benefit
Why it matters
Many confuse KVP with NSC. KVP earns no Section 80C deduction, and its interest is fully taxable at your slab.
Fix
Use KVP to double a lump sum safely, not to save tax. For 80C, choose NSC, PPF, or a tax-saver FD.
Assuming "doubling" is your real return
Why it matters
KVP doubles your money before tax. After the slab tax (no TDS, but taxable) and inflation, the real gain is far smaller — a 30%-bracket saver nets ~5.6%, near inflation.
Fix
Set your slab; the calculator shows the post-tax maturity and the real return. Declare the interest on accrual each year to avoid a big lump at maturity.
Breaking it during the lock-in
Why it matters
KVP has a 2.5-year lock-in, and premature encashment after that pays less than the full doubled value.
Fix
Invest only money you can leave for the full doubling period; keep a separate emergency fund.
Thinking KVP beats equity for long goals
Why it matters
A ~9.6-year doubling is about 7.5% a year — safe, but below long-run equity returns. For long goals it may lag inflation-beating options.
Fix
Use KVP for the safe, guaranteed part of your portfolio; use SIPs or index funds for long-term growth.
Ignoring better-paying safe options
Why it matters
NSC (7.7%) and SCSS (8.2%, seniors) pay more than KVP's 7.5%, sometimes with tax benefits.
Fix
Compare KVP with NSC and SCSS before locking in — pick the best rate that fits your goal and limits.
Pro Tips
Get More From Your KVP
Use it for the safe slice
KVP guarantees doubling with a sovereign backing — ideal for the portion of your savings you want zero risk on.
Declare interest on accrual
Reporting KVP interest each year as it accrues spreads the tax, rather than facing a large taxable lump at maturity.
Compare with NSC first
NSC pays a higher 7.7% and gives 80C. If you have a tax goal, NSC often beats KVP — KVP wins on no upper limit.
Transfer or pledge if needed
KVP certificates can be transferred to another person or pledged as security for a loan, adding flexibility.
Reinvest at maturity
When KVP doubles, reinvest the proceeds into a fresh KVP or a higher-paying option to keep the money working.
Who Uses This
Who Uses This KVP Calculator
The KVP Calculator works across every stage of the workflow.
Conservative lump-sum savers
Someone with a windfall checks how long KVP takes to double it safely with a government guarantee.
Savers wanting no upper limit
An investor who has maxed PPF and NSC uses KVP to park a larger sum, since KVP has no maximum.
Parents planning a future goal
A parent works out whether KVP doubling in ~9.6 years lines up with a child's future expense.
Safe-vs-tax-saving comparers
A saver compares KVP's 7.5% doubling with NSC's 7.7% plus 80C to decide which fits better.
Risk-averse retirees
A retiree allocates part of their corpus to KVP for assured doubling without exposure to markets.
Glossary
Key KVP Terms
Every important term you'll encounter in this calculator and the broader topic.
- Kisan Vikas Patra (KVP)
- A government lump-sum savings certificate that doubles your money over a fixed, rate-linked period — currently 115 months at 7.5%.
- Doubling Period
- The time KVP takes to double your investment: 12 × ln(2) ÷ ln(1 + rate), rounded to whole months. 115 months at 7.5%.
- Maturity Value
- What you receive at the end of the doubling period — exactly twice your investment, by design.
- Lock-in
- The 2.5-year (30-month) minimum holding before KVP can be encashed prematurely, at less than the full doubled value.
- Section 80C
- The tax deduction KVP does NOT qualify for — unlike NSC. KVP is a doubling scheme, not a tax-saving one.
- Sovereign guarantee
- The backing of the government of India, which assures both the principal and the doubling — making KVP very low risk.
- Post-Tax Return
- The effective annual return after the slab tax on the interest. At 30% it is about 5.6%, below the headline 7.5% — so the real doubling takes longer.
- Real Value
- The post-tax maturity after inflation. For a 20–30% bracket investor, KVP's real return is close to zero.
Help & answers
Frequently asked questions
Everything you need to know about how the KVP Calculator works.
01What is a KVP calculator?
A KVP calculator shows how long Kisan Vikas Patra takes to double your money and the maturity value. You enter the investment and rate; it returns the doubling period, the maturity value (twice your investment), and the interest earned.
02How long does KVP take to double money?
At the current 7.5% rate (FY 2025-26), KVP doubles your money in 115 months — that is 9 years and 7 months. The doubling period is set by the government and changes only when the interest rate changes.
03How is the KVP doubling period calculated?
The doubling period is the time for money to double at the given rate, compounded annually: months = 12 × ln(2) ÷ ln(1 + rate). At 7.5% that works out to 115 months, and the maturity is set to exactly twice the investment.
04What is the KVP interest rate for 2025-26?
The KVP rate is 7.5% per annum, compounded annually, for FY 2025-26 — which gives the 115-month doubling period. The rate is fixed when you buy the certificate and the government reviews it each quarter.
05How much does ₹1 lakh become in KVP?
₹1 lakh becomes ₹2 lakh at maturity — in 115 months (9 years 7 months) at 7.5%. KVP is designed so the maturity value is always exactly double your investment, whatever the amount.
06Is there a maximum investment in KVP?
No. KVP has a ₹1,000 minimum and no maximum — you can invest any amount in multiples of ₹100. For deposits of ₹10 lakh or more, PAN and proof of source of funds are required.
07Is KVP eligible for 80C tax benefit?
No. Unlike NSC, a KVP investment does not qualify for a Section 80C deduction. The interest is also taxable at your slab — KVP is a pure doubling scheme, not a tax-saving one.
08Does KVP deduct TDS on the interest?
No, the post office does not deduct TDS on KVP. But the interest is still taxable — you must add it to your income and declare it, ideally on an accrual basis each year or in full at maturity.
09What is the post-tax return on KVP?
Below the headline 7.5%. At a 30% slab the post-tax return is about 5.6% a year, so your money takes longer than 115 months to truly double after tax. Set your slab to see the post-tax maturity.
10Does KVP really double your money after inflation?
In nominal terms, yes. But after tax and ~6% inflation the real return is near zero for a 20–30% bracket investor — so your purchasing power barely doubles. The calculator shows the real, after-tax value.
11Can I withdraw KVP before maturity?
KVP has a 2.5-year (30-month) lock-in. After that you can encash it prematurely, but you receive less than the full doubled value — the amount depends on how long you held it.
12KVP vs NSC — which is better?
NSC pays 7.7%, runs 5 years, and qualifies for 80C, so it suits tax-savers. KVP pays 7.5%, takes about 9.6 years to double, has no 80C, and has no upper limit — it suits parking a large sum to grow safely without a tax goal.
13Is KVP safe?
Yes. KVP is a government of India scheme offered through post offices and some banks, with a sovereign guarantee. Both the principal and the doubling are assured, making it one of the safest fixed-return options.
14Is this KVP calculator free and accurate?
Yes — it is free, needs no sign-up, and runs in your browser. It uses the official doubling-period maths and the 7.5% FY 2025-26 rate. Confirm the prevailing rate at the post office before investing.
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