Retained vs serviced vs rolled-up interest: which changes what you repay?
Retained interest is set aside for the term and added to the facility — usually no monthly payment, higher gross. Serviced interest is paid each month from other funds, so gross stays closer to net plus fee. Rolled-up interest accrues unpaid and may compound, so the exit balance can exceed a simple retained block. None is “best” in the abstract. Use the bridging loan calculator for an indicative estimate only. BridgingLoans.online is an introducer, not a lender.
Last reviewed: 4 October 2026
BridgingLoans.online is an independent UK introducer operated by PASECOM GROUP LTD (company 17139327, ICO ZC117546). We do not lend and we do not advise. Nothing on this page is a quote, an MCOB illustration or an offer of credit.
What do retained, serviced and rolled-up interest mean on a bridging loan?
UK bridging facilities commonly handle interest in one of three ways. The labels describe cash-flow timing and how the gross facility is built — not a ranking of products.
Retained interest — interest for the agreed term is calculated up front and added to the facility. Monthly interest payments are usually nil; you repay the gross balance on exit, subject to any rebate and minimum interest period. This is the default on our bridging loan calculator.
Serviced interest — you pay monthly interest from income or other funds. Interest is typically not added to the facility, so gross sits closer to net plus any financed fee. Lenders usually want affordability evidence for those payments.
Rolled-up interest — unpaid interest is added as the term runs. Some illustrations accrue simply; others compound. The exit balance can exceed a simple retained block at the same rate. Always read the lender’s illustration — we do not invent product rules here.
Related reading: net vs gross bridging loan: how to calculate and bridging loan costs and fees explained.
How does each interest type change the gross loan and your cash flow?
| Interest type | Typical monthly cash during term | What sits in the gross facility | Planning note |
|---|---|---|---|
| Retained | Usually £0 interest | Net + fee (if added) + full-term interest block | Gross LTV rises; check early-redemption rebate rules |
| Serviced | Monthly interest payment | Often net + fee only (interest paid outside) | Gross LTV lower; affordability evidence matters more |
| Rolled-up | Usually £0 interest | Net + fee + accrued interest (may compound) | Exit balance can grow faster than simple retained |
None of these structures is recommended here. Fit depends on exit timing, income evidence, occupancy and lender policy. We introduce enquiries; we do not advise on product choice.
Worked sterling example: retained, serviced and rolled-up side by side
Assumptions match the live calculator defaults (educational; not a product rate from us): £500,000 security, £250,000 net, 12 months, 0.85% a month and a 2% arrangement fee on net.
Shared first steps (fee and interest base)
- Arrangement fee = £250,000 × 0.02 = £5,000
- Interest base (net + fee) = £250,000 + £5,000 = £255,000
- Monthly interest on that base at 0.85% = £255,000 × 0.0085 = £2,167.50
Column A — retained (site calculator default)
| Line | Amount |
|---|---|
| Security value | £500,000 |
| Net funds needed | £250,000 |
| Arrangement fee (2% of net, added to the loan) | £5,000 |
| Interest base (net + fee) | £255,000 |
| Monthly interest at 0.85% | £2,167.50 |
| Total interest (12 months, simple retained) | £26,010 |
| Gross facility | £281,010 |
| Net LTV | 50.0% |
| Gross LTV | 56.2% |
| Total cost of credit (fee + interest) | £31,010 |
Indicative educational example using this site’s calculator method: fee = net × 2%; interest = (net + fee) × 0.85% × months; gross = net + fee + interest. The 0.85% a month and 2% fee are teaching defaults, not our rates and not a quote. Valuation, legal and broker costs are not included.
Monthly interest cash during the term is £0 in this model, and the total to repay at term (no rebate, no extra fees) is £281,010. This matches the live calculator, which charges interest on net plus fee.
Column B — serviced (indicative educational comparison)
Same rate and fee, but interest is paid monthly and not financed inside the facility:
- Monthly interest cash ≈ £2,167.50
- Interest over 12 months if payments are met ≈ £26,010 (paid outside the loan)
- Indicative gross ≈ net + fee = £255,000; gross LTV ≈ 51.0%
- Total cost of credit ≈ £31,010 — similar total interest here, but the cash-flow timing differs completely
Lender practice varies; some calculate serviced interest on net only. Treat this as educational, not a quote.
Column C — rolled-up (simple accrual vs compounding)
Simple accrual (no compounding): interest can still total £26,010 over 12 months, so the exit block can look like retained. Differences often sit in unused months, extensions and early-exit rules.
Compounded monthly example (educational assumption only): if unpaid interest compounds monthly at 0.85% for 12 months on a £255,000 base, the compound factor is (1.0085)12 ≈ 1.1069, so interest ≈ £27,261, indicative gross ≈ £282,261, gross LTV ≈ 56.5% and total cost of credit ≈ £32,261. That is about £1,251 more interest than simple retained on these assumptions. Some lenders compound; some do not. Always read the illustration.
Side-by-side summary (same defaults)
| Metric | Retained (simple) | Serviced (interest outside) | Rolled-up (monthly compound example) |
|---|---|---|---|
| Monthly interest cash | £0 | ~£2,167.50 | £0 |
| Interest over 12 months | £26,010 | ~£26,010 (paid in cash) | ~£27,261 |
| Indicative gross | £281,010 | ~£255,000 | ~£282,261 |
| Indicative gross LTV | 56.2% | ~51.0% | ~56.5% |
| Total cost of credit (fee + interest) | £31,010 | ~£31,010 | ~£32,261 |
Educational only — not a quote, not an MCOB illustration, not an offer of credit. Pricing, fee bases, compounding and rebates vary. Run your figures on the bridging loan calculator, then contact us if you want an introduction.
What do indicative market interest and fee bands look like?
Guidance only. Not our rates. Not a quote. Indicative market context as at 4 October 2026.
| Cost element | Indicative band | Source and notes |
|---|---|---|
| Mainstream monthly interest | ~0.65%–0.95% a month | FD Commercial / Fox Davidson public rates guide, reviewed 22 September 2026 |
| Market average (Q2 2026) | ~0.81% a month | Bridging Trends contributor data as reported in UK trade press |
| Arrangement / facility fee | often ~1%–2% of the facility | Public fee tables; sometimes on gross rather than net; may be added to the loan |
Bank of England Bank Rate was 3.75% in late September 2026. Bridging is priced mainly on security, LTV and exit. Compare total repayable and exit clarity, not a headline monthly rate alone. The full fee stack, including valuation and legal costs, is in bridging loan costs and fees explained.
Does occupancy change whether a bridge is regulated or unregulated?
Yes — occupancy is a legal fork, not a marketing label, and the interest type does not remove that fork.
- If you or a close family member will occupy the security as a dwelling, the facility is more likely regulated, with MCOB disclosure and affordability rules applied by the lender and any advising broker. Serviced interest usually brings closer scrutiny of monthly affordability.
- Investment, commercial or limited-company stock that is not your (or a family member’s) residence more often follows an unregulated route. Retained and rolled-up interest are common on short-term investment bridges — a market observation, not a recommendation.
We introduce enquiries; we do not decide which perimeter applies. Where occupancy is yes, we pass a complete pack to an FCA-regulated broker. Do not treat this as advice to choose a regulated or unregulated product, or as advice that one interest type is preferable. See regulated bridging and unregulated bridging.
Which planning mistakes trip people up with interest type?
- Sizing the deposit from net cash only while the lender caps gross LTV.
- Ignoring interest charged on the fee when the fee is added before interest — our educational retained model charges interest on net plus fee.
- Treating 0.85% a month and a 2% fee as a quote — they are site defaults for visible arithmetic, not rates from us.
- Planning serviced interest without a monthly cash source that survives a delayed exit.
- Treating rolled-up as identical to retained without checking compounding.
- Forgetting valuation, legals and any broker or exit fee outside the simple gross total.
How should you stress-test the numbers before you enquire?
- Fix the net cash you truly need.
- Apply a realistic fee (often around 1–2%) and a monthly rate from current market bands.
- Model retained with interest on net plus fee for the full term, plus a contingency month if the exit could slip.
- If considering serviced, write down the monthly cash source and what happens if the exit slips.
- If rolled-up, ask whether interest is simple or compounded, and on what balance.
- Check gross LTV against evidenced security value, and write down an exit date that survives delay. See exit strategies for bridging finance.
For a human review of purpose, occupancy and exit, use contact. Run the calculator first so interest type and net/gross are clear in your notes.
Your home or property may be repossessed if you do not keep up repayments on a mortgage or other debt secured on it.
Indicative estimate only. Not a quote, illustration under MCOB, or offer of credit. BridgingLoans.online is a trading name of PASECOM GROUP LTD (company 17139327, ICO ZC117546), an introducer, not a lender. Email hello@bridgingloans.online.
Last reviewed: 4 October 2026.
FAQs
What is retained interest on a bridging loan?
Interest for the term is calculated up front and added to the facility. Monthly interest payments are usually nil; you repay the gross on exit, subject to any rebate and minimum interest period. Our calculator default uses simple retained interest on net plus fee.
What is serviced interest on a bridging loan?
You pay monthly interest from income or other funds. Interest is typically not added to the gross facility, so gross LTV can sit closer to net plus fee — but lenders usually want evidence you can meet the payments.
What is rolled-up interest on a bridging loan?
Unpaid interest is added to the outstanding balance as the term runs. Some products accrue simply; others compound. A compounded exit can exceed a simple retained block at the same headline rate — always read the illustration.
Is retained interest better than serviced or rolled-up?
No structure is better in the abstract. Retained and rolled-up usually cut monthly cash pressure but raise gross. Serviced can keep gross lower but needs a monthly payment source. We do not recommend a product.
Do the 0.85% a month and 2% fee on the calculator come from BridgingLoans.online?
No. They are educational defaults so the arithmetic is visible. Market bands are cited separately from dated public sources. We do not publish rates because we are not the lender.
Can you give me a formal illustration comparing all three?
No. This guide and the calculator are educational. Formal illustrations come from the FCA-regulated broker or lender after introduction. Use the calculator first, then enquire if you want an introduction.
Next step
Use the calculator for an indicative starting point, then enquire if you want an introduction.