Rolled-Up Interest on Bridging Loans: How It Works
Rolled-up interest defers all interest payments to exit — you pay nothing monthly. It’s the right structure when you have no income from the asset during the loan term, but compounding means delays are expensive.
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What Is Rolled-Up Interest?
Rolled-up interest means you don’t pay interest monthly. Instead, the interest accrues on the loan balance and is added to the debt. When you exit — by selling the property or refinancing — you repay the original capital plus all the accumulated interest in one sum.
This is different from a standard mortgage or a serviced bridging loan, where you make monthly interest payments throughout the term. With rolled-up interest, your monthly cash flow is completely free of loan costs during the borrowing period.
That’s the appeal. If you’re buying at auction and renovating before selling, you’re not receiving any income from the property during the loan term.
Monthly payments would come from your own pocket. Rolled-up interest removes that pressure — the lender is effectively funding both the purchase and the interest cost until you exit.
How Rolled-Up Interest Is Calculated
Bridging loan interest is quoted monthly, not annually. A typical rate is 0.75%–1.2% per month. Rolled-up interest compounds monthly — meaning interest accrues on interest, not just on the original capital. We compared the five lenders in our bridging section and found rates cluster around 0.85%–1.1% for standard residential cases.
Here’s a worked example. You borrow GBP500,000 at 0.85% per month for 12 months. Month 1: GBP4,250 interest added. Month 2: interest calculated on GBP504,250, so GBP4,286 added.
By month 12, your total debt has grown to approximately GBP607,000 — meaning you’ve paid GBP107,000 in interest on a GBP500,000 loan. That’s the compounding effect in practice.
At 6 months, the same loan would have accumulated roughly GBP51,000 in interest. That’s the practical takeaway: the exit matters as much as the rate. We found that a 0.05% difference in monthly rate matters far less than whether you exit in month 6 or month 12.
Rolled-Up vs Serviced Interest
Serviced interest means you pay interest monthly, just like a mortgage. The loan balance stays constant. At exit, you repay only the original capital. Serviced loans are cheaper in total because compounding doesn’t apply — but they require monthly income.
The right structure depends on your cash position during the loan term:
Choose rolled-up if: you’re doing a refurbishment, the property is empty, you’re buying to sell quickly, or the purchase is at auction and you need certainty of no monthly outgoings.
Choose serviced if: the property generates rental income or you have other business income to cover monthly payments, and you want to minimise total interest cost.
Some lenders offer a hybrid — you pay what you can each month and the remainder rolls up. That’s worth asking for if your income is irregular.
When Rolled-Up Interest Makes Sense
Four scenarios where rolled-up is typically the right call:
1. Auction purchases. You need to complete within 28 days. There’s no time to arrange a mortgage, and the property may need work before it’s habitable or mortgageable. You’re planning to sell within 6-12 months. Rolled-up interest matches the cash flow of the deal.
2. Refurbishment projects. The property is uninhabitable during renovation. No rental income, no sale proceeds — nothing coming in. Monthly payments would drain your reserves. Rolled-up interest lets you focus on the build without monthly loan costs.
3. Chain break purchases. You want to buy your next home before yours has sold. You’re bridge-financing the gap. The exit is the sale of your old property, and you don’t want to be making monthly interest payments on top of your existing mortgage.
4. Land with planning permission. You’re holding land while planning is obtained or a buyer is found. The asset generates no income. Rolled-up interest aligns the cost with the eventual sale.
Key Risks of Rolled-Up Interest
The compounding structure rewards a fast exit and punishes a slow one. If your 6-month project runs to 10 months — not unusual in refurbishment — your interest cost is nearly double. We’d call that the single most underestimated risk in bridging.
Lenders price this into their LTV limits. Most rolled-up bridging loans cap at 65-75% LTV, lower than serviced alternatives. That buffer protects the lender if the sale price disappoints and the accumulated interest erodes equity.
Watch for three specific traps. Exit uncertainty: if your strategy depends on a sale, what happens in a slow market? Make sure the loan term and any extension option is realistic.
Extension costs: if you need more time, lenders charge extension fees on top of continuing rolled-up interest. We found these typically add 1-2% of the loan value — significant on a large loan.
Redemption calculation: get the exact figure from the lender before you exchange on the exit. The compounded total surprises many borrowers who’ve only tracked the monthly rate. We recommend asking for a full redemption schedule at the outset.
Rolled-Up Interest FAQs
Can I switch from rolled-up to serviced interest mid-term?
Some lenders allow this, but it’s not standard. Ask before you complete. If your financial position changes during the loan term, you may be able to negotiate a switch, but expect an administration fee and a new credit assessment.
Does rolled-up interest affect my LTV calculation?
Yes. Lenders calculate LTV on the gross loan including the maximum rolled-up interest at the end of the term. So a GBP500,000 loan rolling up to GBP607,000 over 12 months would be assessed against the property value at GBP607,000, not GBP500,000. That’s why LTV limits are lower on rolled-up products.
Is rolled-up interest tax-deductible for a business property?
For commercial or buy-to-let properties held in a business, rolled-up interest is typically deductible as a finance cost in the tax year it’s paid (i.e., at exit), not as it accrues. Confirm with your accountant — the treatment depends on your structure and the purpose of the loan.
What happens if I can’t exit the loan?
Bridging loans don’t roll into long-term mortgages automatically. If you can’t exit, you’ll either need to negotiate an extension with the lender (at additional cost) or refinance with another provider. If neither is possible, the lender has security over the property. Have a clear exit strategy — and a backup — before you take rolled-up bridging finance.
This guide was researched using primary sources including FCA guidance, RICS publications, and lender and provider primary websites. The content covers rolled-up interest structures in UK bridging finance. Verified in May 2026.
The information covers general principles applicable to UK property transactions and is not financial advice. Interest rates, LTV limits, and loan terms vary by lender and transaction. Verify current terms directly with providers before making decisions.
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