If you already have a home loan and need extra money, for a renovation, a wedding or to clear costlier debt, you usually have two options. You can take a top-up loan from your home loan lender, or a personal loan. A top-up often has a lower rate. But a lower rate does not always mean you pay less. The tenure, fees and prepayment rules matter just as much. This guide compares them with real rupee figures.
What is a home loan top-up?
A top-up is an extra loan given to an existing home loan borrower, on top of the outstanding home loan. It is usually secured by the same house. Terms differ by lender. SBI's Home Top Up Loan page, for example, says it is for existing home loan customers, can be used for personal needs but not for speculative purposes, and can run for up to 30 years.
A personal loan is unsecured: you pledge nothing. Lenders price it on your income and credit score. SBI's personal loan FAQ says its personal loans carry a fixed rate linked to its 2-year MCLR, with a maximum repayment period of 7 years.
How do the interest rates compare?
Here is one bank's published grid. Union Bank of India's retail rate sheet effective 8 October 2026 prices its top-up ("Union Mortgage Plus") at 0.75% above the rate on your home loan, with an extra 0.10% if your CIBIL score is below 700. Its personal loan rates depend on your score:
| CIBIL score band | Home loan, salaried (Union Home) | Top-up (home loan rate + 0.75%) | Personal loan, salaried (Union Personal) |
|---|---|---|---|
| 800 to 824 | 7.45% | 8.20% | 9.30% |
| 750 to 799 | 7.60% | 8.35% | 9.60% |
| 700 to 749 | 8.00% | 8.75% | 10.10% |
| 650 to 679 | 9.10% | 9.95% (incl. extra 0.10%) | 11.05% |
The top-up column assumes your home loan is at that band's current rate. In practice the top-up is priced off your home loan's rate. Other lenders use different grids, so check the current rates of your own lender.
Worked example: ₹5 lakh for a renovation
Say your home loan is at 7.60% and your CIBIL score is 760. You need ₹5,00,000. Using the grid above, the top-up costs 8.35% and a personal loan costs 9.60%. EMIs use the standard formula: EMI = P × r × (1 + r)^n ÷ ((1 + r)^n − 1), where P is the loan, r is the monthly rate (yearly rate ÷ 12 ÷ 100) and n is the number of months.
| Option | Rate | Tenure | EMI | Total interest |
|---|---|---|---|---|
| Top-up | 8.35% | 5 years | ₹10,222 | ₹1,13,329 |
| Personal loan | 9.60% | 5 years | ₹10,525 | ₹1,31,523 |
| Top-up | 8.35% | 10 years | ₹6,159 | ₹2,39,109 |
| Top-up | 8.35% | 15 years | ₹4,880 | ₹3,78,370 |
What the numbers show:
- At the same 5-year tenure, the top-up saves ₹18,194 in interest and ₹303 a month.
- Stretch the top-up to 15 years and the EMI drops to ₹4,880, but total interest rises to ₹3,78,370. That is almost three times the personal loan's ₹1,31,523, even at a lower rate.
- The cheapest choice is usually the lower rate over the shortest tenure you can afford.
What about fees and prepayment charges?
Processing fees. SBI's published personal loan (Xpress Credit) fee is 1.50% of the loan amount, with a minimum of ₹1,000 and a maximum of ₹15,000, plus GST. On ₹5,00,000 that is ₹7,500, or ₹8,850 with 18% GST. SBI lists a 50% concession on the card rate for home loans and top-up loans, with a full waiver in selected cases. Other lenders differ. Ask for each fee in writing.
Prepayment charges. Under RBI's prepayment directions, for loans sanctioned or renewed on or after 1 January 2026:
- A floating-rate loan to an individual for a non-business purpose carries no prepayment charge. A floating-rate top-up used for personal needs falls here.
- A fixed-rate loan, which many personal loans are, may carry charges as per the lender's policy, based on the amount prepaid. SBI's FAQ, for example, says closing its personal loan before 3 years attracts a 2% charge on the amount prepaid.
If you expect to repay early, for example from a bonus, the top-up may give you more freedom.
What other differences matter?
| Home loan top-up | Personal loan | |
|---|---|---|
| Security | Usually your house | None |
| Who can get it | Existing home loan borrowers, on the lender's conditions | Anyone the lender approves on income and credit score |
| Tenure | Can be long (up to 30 years at SBI) | Shorter (up to 7 years at SBI) |
| Rate type | Floating at Union Bank (priced off your home loan rate) | Fixed at SBI (linked to 2-year MCLR) |
| Paperwork | May need property papers and a valuation | Usually income and KYC documents |
The big risk with a top-up is that your house secures it. If you cannot repay, the lender may act against the property. A personal loan default also hurts your credit score and brings recovery action, but your home is not pledged for it.
Is there a tax benefit on a top-up loan?
Tax rules look at what the money is used for, not at the loan's name. From 1 April 2026, the Income-tax Act, 2025 applies. Under its Section 22, interest on money borrowed to acquire, construct, repair, renew or reconstruct a house property can be deducted from income from that property. For a self-occupied home:
- The deduction is capped at ₹2,00,000 for a house acquired or constructed with a loan and completed within five years from the end of the tax year in which the money was borrowed. It is ₹30,000 in any other case. The total for such properties cannot exceed ₹2,00,000. How a repair loan fits within these limits depends on your case, so check it with a tax adviser.
- Principal repaid on a loan used for renovation or repairs after completion or occupation does not count for the Section 123 deduction, under Schedule XV.
- Under the new tax regime, the default under Section 202, this interest deduction is not allowed for a self-occupied home.
If the money goes to a wedding, a car or a holiday, there is no house property deduction. Keep bills as proof of use and check with a tax adviser before you count on any benefit.
When does each option make sense?
- A top-up may suit you if your home loan record is clean, the rate gap is meaningful, you will repay over a short tenure, and you are comfortable pledging your house for the extra amount.
- A personal loan may suit you if you need the money fast, the amount is small, you do not want to add to the debt secured on your house, or a top-up is not offered to you.
- Either way, compare the full cost: rate, tenure, fees and prepayment charges. Ask for the Key Facts Statement, which shows the APR (annual percentage rate, including fees).
Do it in 10 minutes, free
Use the compare offers calculator on LowerMyEMI. Enter the top-up and personal loan quotes with their rates, tenures and fees to see the total cost of each, and export it to Excel or PDF. If your home loan rate itself looks high, LowerMyEMI can write one email per lender asking for a better offer, which you send from your own email. Lenders decide the rate; nothing is guaranteed.