Gold often sits idle in bank lockers across India, whether as family heirlooms, wedding gifts, or emergency reserves. When cash runs short, this same gold can be used as collateral to secure a loan at significantly lower interest rates compared to unsecured borrowing. 

Knowing how gold loan interest calculation works helps borrowers compare offers and avoid surprises at repayment time. The method varies by lender. Some use simple interest on the entire principal. Others apply reducing balance. A few offer bullet repayment where interest accumulates until maturity.

Gold purity affects everything. Lenders accept 18 karat minimum usually. The interest rate might stay constant but the loan amount depends heavily on gold quality. 24 karat pure gold fetches maximum value. 22 karat, common in Indian jewellery, receives slightly less. 18 karat ornaments with high making charges might disappoint borrowers expecting more. 

RBI caps gold loan values at 75% of market price. If gold prices sit at ₹60,000 per gram and someone pledges 100 grams of 22 karat gold, the calculation would be as follows: 

First adjust for purity. As 22 karat equals roughly 91.6% pure gold, 100 grams of 22 karat contains about 91.6 grams of pure gold. At ₹60,000 per gram, that values around ₹55 lakh. RBI allows loan to value (LTV) ratio of 75% on gold loan, meaning maximum loan of about ₹41 lakh. Most lenders offer less, maybe 65 to 70%, building in safety margin against price drops. 

Interest calculation methods create confusion. Simple interest charges stay predictable. For example, if you borrow ₹5 lakh at 12% for one year, the total interest for the loan would be ₹60,000, which makes the total repayment as ₹5.6 lakh. However, the reducing balance works differently. Monthly interest applies to the outstanding amount only. Pay some principal early and the interest base shrinks. A borrower repaying ₹50,000 monthly on that ₹5 lakh loan would pay less total interest than the simple method calculates. 

Bullet repayment schemes need careful attention. The borrower pays nothing monthly. The interest amount compounds and gets added to the principal. At maturity, the full accumulated amount comes due. Someone borrowing ₹3 lakh at 11% for 18 months under bullet terms might owe ₹3.55 lakh at closure. The headline rate looks low but actual cost climbs because of compounding. You can use Finnable's gold loan EMI calculator to estimate the eligible loan amount and monthly repayment based on the gold weight and current rates. 

Apart from the interest rates, borrowers must consider the fees and charges for a loan which will add up to the interest costs. Processing fees usually ranges from 0.5 to 4%. The borrower also has to pay late payment penalties if EMI dates get missed. Insurance on pledged gold costs extra at certain institutions. Valuation charges for gold assessment and locker storage fees, levied by some lenders, are some of the other charges that you should consider while calculating the borrowing costs.  

Gold price movements create additional complexity. If gold prices drop significantly during the loan tenure, lenders might issue margin calls. The borrower then needs to either pledge more gold or repay part of principal to maintain the required loan-to-value ratio. Rising prices benefit borrowers, falling prices create stress. 

Not all gold loan providers price identically, and the difference across institutions can significantly affect total repayment. Nationalised banks typically offer the lowest rates, ranging from 7.5 to 10% annually, but their documentation requirements are stricter and processing timelines longer.  

Specialised NBFCs offer faster disbursals with more flexible eligibility but charge 12 to 26% depending on the scheme chosen. Private banks fall somewhere in between. Rate variations often depend on tenure, with shorter tenures attracting lower rates in some lender schemes. Borrowers comparing offers should always request the annualised effective rate inclusive of all fees rather than relying solely on the advertised monthly rate figure. 

The loan-to-value ratio, commonly referred to as LTV, determines how much a borrower can receive against pledged gold. RBI mandates a maximum LTV of 75% for gold loans extended by banks and NBFCs. In practical terms, this means a borrower pledging gold worth ₹10 lakh can access a maximum of ₹7.5 lakh.  

Most lenders operate conservatively at 65 to 70% to protect against sudden gold price corrections. LTV directly influences both the loan amount available and the risk of a margin call. When gold prices fall sharply, the existing loan may exceed the permissible LTV threshold, prompting the lender to demand additional gold or partial principal repayment to restore the required ratio. 

Gold loans may appear cheaper on paper compared to personal loans, but they carry considerations that unsecured lending does not. Pledging family jewellery creates emotional stress, particularly when repayment becomes uncertain. Margin call risk during volatile gold price periods adds financial pressure on top of existing repayment obligations.  

For borrowers needing smaller amounts between ₹1 lakh and ₹5 lakh with a clean repayment record, an unsecured personal loan from an NBFC like Finnable eliminates asset risk entirely. The higher interest rate reflects the absence of collateral, but gold remains safely in the borrower's possession throughout. For needs requiring larger amounts or where rate sensitivity is high, gold loans retain a clear cost advantage provided the borrower is confident about repayment timelines.