KVP doubles money in 115 months: what's left after tax

The one promise KVP makes

Kisan Vikas Patra (KVP) is the simplest certificate at the post office counter. You pay a sum, and after a notified number of months the post office pays you twice that. For the October–December quarter of FY 2026-27 the rate is 7.5% a year, compounded annually, and the notified period is 115 months, nine years and seven months. The rate has not changed since 1 April 2023. A ₹1 lakh certificate bought in October 2026 pays ₹2 lakh in May 2036.

The minimum is ₹1,000, then multiples of ₹100, with no upper limit. The certificate cannot be encashed for the first 30 months except on a holder's death, forfeiture by a pledgee or a court order. After that, early encashment pays a notified table value, which is lower than the headline rate implies. The KVP calculator runs the numbers for any amount, and our guide to post office small savings schemes places KVP among its siblings.

Checking the 115 months

The rule of 72 says money doubles in roughly 72 divided by the rate, in years. At 7.5% that is 9.6 years, or 115.2 months. The exact figure is the logarithm of 2 divided by the logarithm of 1.075: 9.58 years, or 115.01 months. So the notified period is neither a bonus nor a penalty. It is the rate, compounded once a year, rounded to the month.

One small wrinkle: 1.075 raised to the power 115/12 is 1.99985, so the calculator shows ₹1,99,985 on ₹1 lakh. India Post pays the round ₹2 lakh, which is what the notified period promises.

The CAGR of a doubling in 115 months is 7.50%. That is the number to hold up against other options, not the 100% gain over the whole term.

Where the tax lands

KVP has no tax break at either end. Nothing you invest counts towards the ₹1.5 lakh deduction (the old section 80C, now section 123 of the Income-tax Act, 2025), and the interest is taxed at your slab. Because no TDS is deducted, some holders assume the interest is exempt. It is not, and it has to be declared.

To compare it fairly, put three options on the same footing: ₹1 lakh for the same 115 months.

• KVP at 7.5%, interest taxed at slab.
• A bank FD at 7%, the representative rate the FD calculator uses, compounded quarterly. Its interest is taxed every year as it accrues, so only the after-tax amount compounds.
• A debt fund, taxed at slab on redemption for units bought on or after 1 April 2023, so the whole amount compounds until you sell. Two past returns stand in for it: the 6.28% a year that corporate bond funds and banking and PSU funds each averaged over five years, and the 7.02% that the 11 corporate bond funds with a ten-year record averaged. Both are Direct Growth plans, to 9 October 2026.

The slab rates below include the 4% cess: 20.8% for the 20% slab and 31.2% for the 30% slab.

The same results as a yearly return:

The FD and debt-fund rows match what the FD vs debt fund calculator returns for the same inputs. The KVP rows tax all the interest at one slab. If you pay that tax year by year as the interest accrues, the total is the same at a flat slab, but you pay it sooner.

What the table says

At the rates in force, KVP is ahead. A 7.5% rate fixed for nine and a half years beats a 7% FD before tax, and the FD's yearly tax widens the gap. At the 30% slab KVP keeps ₹10,586 more than the FD on every ₹1 lakh.

The debt fund's edge is deferral, and here it is not enough. A fund pays no tax until you sell. Against an FD at the same 7%, the calculator puts that deferral at ₹6,771 over 115 months at the 30% slab. But a fund has to earn more than 7.5% before tax to match KVP, and neither category average did. Our debt fund YTM post found the median corporate bond portfolio yielding 7.47% at the end of August 2026, about 7.14% after costs: still short of 7.5%.

Below the tax line, the order holds. If your income stays under the new regime's ₹12 lakh rebate limit, none of these is taxed, and KVP's 7.50% still leads the FD's 7.19% effective rate. The old vs new regime calculator shows where you stand.

What the table leaves out

Access. An FD can usually be broken early for a small penalty, and a debt fund can be redeemed on any business day. KVP is shut for 30 months and pays a table value after that. Money you may need within three years belongs in a liquid fund or a savings account, not a certificate.

Rate risk runs both ways. KVP locks 7.5% for 115 months. If rates fall, that is a good lock. If they rise, you sit below the market, while a debt fund's portfolio rolls into the higher yields. Splitting an FD into a ladder softens the same problem.

The fund numbers are history, not a rate. Debt fund returns move with interest rates and credit events, and the ten-year average rests on 11 funds. KVP and an FD state their rate in advance; a fund does not. Debt funds explained covers what can go wrong.

Inflation takes its share. At the 30% slab, 5.62% a year after tax is only about 0.59% a year above inflation if prices rise 5% a year, an assumption rather than a forecast. That is the quiet arithmetic in inflation and your savings.

When KVP fits

KVP suits money with a known use about ten years out, held by someone who wants a fixed rate, no market price and no ceiling on the amount. If you have not yet used the room in PPF, which is exempt at every stage, that usually comes first. If you want a deduction as well as a fixed rate, the five-year NSC is the sibling to compare. If the money can sit in equity for a decade, KVP is the wrong comparison.

None of this is a recommendation. Small savings rates are reset every quarter by the Ministry of Finance, and the doubling period changes whenever the rate does, so check the current notification on India Post before you buy.