The secret of 0% Interest Loans !

Apurva Singhi
4 min readSep 28, 2021


Does the 0% interest loan really cost 0%?

How many people would be enticed into this tempting offer? How many of them are actually are aware of what the 0% interest actually entails?

Any consumer durable retail outlet you visit to buy any appliance or gadget, you will find multiple offers like these. There are typically 3 ways that you can opt to buy a product.

  • Cash down / Credit card payment / Debit card payment
  • Zero cost EMI on your Credit card (If no offer on your CC, they will also sell you a new CC)
  • 0% or low-cost EMI (from some financier/bank)

1. Cash down / Credit Card Payment / Debit card Payment: In the Cash down option, you can negotiate and get some cash discount in most cases. This depends on your negotiation skills and how desperate the sales guy is to fulfill his target. Some stores may also charge you some additional fee if you are paying by CC instead of cash payment.

2. Zero cost EMI on your Credit Card: Some CC companies also offer you EMI options on certain products while purchasing from certain retailers. Sometimes, it may be zero-cost EMI, and, in some cases, they may charge you a fee. Please ensure you understand the fine print before opting for such options.

Now let us understand how this works. Please refer to Table 1.

Scenario 1:

You bought a product costing₹ 10000, and you are offered 0% interest on it, so you need to pay 10 EMIs of ₹ 1000 each.

Scenario 2:

Now the sales guy tells you that you just need to pay ₹500 as a processing fee. In most cases, people are fine with it as they don’t consider processing fees as interest. But look at the IRR. It is now 11.32% instead of 0%.

Scenario 3, 4 & 5:

Now let’s see what happens when you pay a few EMIs in advance. Mind you, you are still paying the same amount i.e. 10 EMIs of ₹ 1000 each. But, just look at the IRR. Even with 1 advance EMI, the IRR becomes 13.90%, with 2 advance EMIs, it becomes 17.48 % and with 3 advance EMIs, it becomes a whopping 22.65 %. This is because IRR takes into account the Time Value of Money. (That is a separate topic in itself)

Table 1

3. 0% or low-cost EMI (from some financier/bank): On some products, you will be able to get 0% or very low-cost EMI options. In most cases, the Financiers/Banks have tie-ups either at the Brand Level or at a Product Level, or sometimes even the local retail outlet may have a tie-up. In such scenarios, there are some special discounts that are only available to the financier when the customer avails of the loan facility.

Now let’s see how these discounts (or subventions as they are popularly known internally) impact the IRR. (Refer Table №2)

Scenario 1:

Remains the same as in the previous table.

Scenario 2:

There is no processing fee charged but the financier gets ₹ 500 as Mfr / DLR discount. Since you are unaware of this discount, it is still 0 % for you, but the IRR is 11.32 %

Scenario 3:

Now consider, they also charge you a processing fee. You are not aware of the Mfr/DLR discount. Look at the IRR. It has shot up to 23.56 %

Now let’s look at the impact of Advance EMIs on IRR. For the sake of simplicity, let’s consider that you are not charged any Processing Fees. So effectively, it is 0 % interest for you.

Scenario 4:

With 1 advance EMI, no Proc fees, and ₹ 500 as Mfr / DLR discount, the IRR is 13.90 %.

Scenario 5:

All else remaining the same as Scenario 4, if the discounts are higher, say ₹ 1000, the IRR becomes 29.07%.

Scenario 6:

Now if you are paying 2 advances EMIs, the IRR becomes a whopping 36.80%.\

Table 2

Now, these 0 % interest loans are not necessarily bad for you, if you are able to avoid the following pitfalls.

  • Make sure that the financier or the credit card company is not going to charge you any interest on such loans in future. Please make sure it is mentioned in the documents/forms that you are signing.
  • Always, and I mean always, ensure that you pay the amount due on time. DO NOT give in to the temptation of carrying the due amount to next month. This can entail heavy penalties like the interest of more than 3 % per month (which is about 36% to 42% p.a.) This can also spoil your credit score.
  • Ascertain the affordability of the product upfront and ensure that you are not relying on this loan alone to buy it.

There is no harm in opting for these loans if you can strictly adhere to the above guidelines. In fact, such loans can be used to your advantage by ensuring that there is no additional outflow from your pocket due to the loan.

Disclaimer: Scenarios presented here have been taken from multiple sources available on internet and compiled under one write up to simplify the information. We are not responsible for the authenticity of the numbers as the context changes as when this blog is being read.



Apurva Singhi

Founder & CEO, Siddhanam Capital MBA,CFP, FPSB-USA. Sharing new age wisdom on Personal Finance, Managing Money, Blockchain, Artificial Intelligence.