Flexible Interest Options for Bridging Loans

Understand monthly serviced, rolled-up, and retained interest options. Compare real costs with worked examples and choose the right payment method for your cashflow and exit strategy.

Interest Rates From
0.45% Monthly
Interest Payment Methods
3 Options
Real Cost Impact
£6k+ Difference

Three Flexible Interest Payment Options

Each interest type works differently and suits different situations. Here's how each option works with real numbers.

Monthly Serviced Interest

You pay interest monthly throughout the loan term

How It Works:

Interest is calculated and charged monthly. For example, on a £200,000 loan at 0.50% monthly, you pay approximately £1,000 per month. This amount is paid to the lender each month.

Worked Example:

loan

£200,000

rate

0.50% monthly

monthly Payment

£1,000

six Month Total

£6,000

twelve Month Total

£12,000

Advantages:

  • Lowest total interest cost over time
  • Matches typical mortgage-style payments
  • No surprise lump sum at the end
  • Easier cashflow management for many borrowers
  • Demonstrates ability to service debt to lenders

Disadvantages:

  • Requires monthly cashflow to cover payments
  • Must budget for ongoing monthly payments
  • If refinancing fails, you stop paying interest (negative for lender)
  • Not ideal if cashflow is uncertain during term

Best For:

  • Developers with steady construction cashflow
  • Property investors with rental income
  • Businesses with predictable monthly revenue
  • Auctions with immediate refurbishment work

Lender Perspective:

Lenders prefer this option as it reduces risk - interest is paid throughout the loan, not just at the end

Rolled-Up (Compounded) Interest

Interest accrues and is paid as a lump sum when you exit (sell or refinance)

How It Works:

Interest is calculated but not paid monthly. Instead, it accrues (compounds) and is deducted from your sale proceeds or paid when you repay the loan. On a £200,000 loan at 0.50% monthly for 6 months, interest compounds to approximately £6,150.

Worked Example:

loan

£200,000

rate

0.50% monthly

six Month Interest

£6,150 (compounded)

twelve Month Interest

£12,650 (compounded)

net Proceeds6 Month

£193,850 (from £200k sale)

net Proceeds12 Month

£187,350 (from £200k sale)

Advantages:

  • No monthly payments required - improves cashflow
  • Interest compounds, resulting in higher total cost but cleaner exit
  • Better for projects with uncertain or variable cashflow
  • Developers can reinvest monthly savings into project
  • Ideal for properties generating no rental income during the loan

Disadvantages:

  • Higher total interest cost due to compounding effect
  • Lump sum payment reduces net proceeds from sale
  • Must have enough sale proceeds to cover compounded interest
  • Less transparent - total cost not immediately obvious
  • If sale price drops, you may not cover interest and loan

Best For:

  • Developers with uncertain cashflow during construction
  • Refurbishment projects requiring significant renovation spend
  • Properties being developed or upgraded with no rental income
  • Investors flipping properties quickly without rental phase

Lender Perspective:

Lenders charge higher rates for rolled-up interest as they carry more risk - no interim cashflow

Retained/Deducted Interest

Interest is calculated upfront and deducted from the loan amount you receive

How It Works:

Interest is calculated for the full loan term upfront and deducted from the loan advance. For example, borrowing £200,000 for 6 months at 0.50% monthly: interest calculated as £6,150, so you receive only £193,850 while repaying the full £200,000.

Worked Example:

loan

£200,000

rate

0.50% monthly

six Month Interest

£6,150

advance Received

£193,850

repay Amount

£200,000

net Cost

£6,150

Advantages:

  • Total cost is known upfront and transparent
  • Interest is fixed - no compounding surprise
  • Simpler to calculate and understand
  • Useful for precise project budgeting
  • Interest is pre-paid, reducing lender risk

Disadvantages:

  • Receive less upfront capital than you borrow
  • Must factor the reduced advance into your project budget
  • Worst effective rate - you pay full term interest even if you repay early
  • Reduces available working capital for project
  • Early repayment provides no refund of pre-paid interest

Best For:

  • Short-term bridge loans (3-6 months)
  • Auction purchases where timeline is certain
  • Borrowers who need absolute clarity on total cost
  • Projects with well-defined, short timelines

Lender Perspective:

Lenders like this option as risk is minimised - interest is received upfront, regardless of exit

Real Cost Comparison: £200k & £500k Examples

See how interest costs differ across the three payment options with real loan scenarios

Bridge £200,000 for 6 months at 0.50% monthly

1
Monthly Serviced Interest

interest Cost

£6,000

net Proceeds

Full loan amount

advance Received

£200,000

total Cost To Repay

£200,000 + £6,000 in monthly payments

2
Rolled-Up (Compounded) Interest

interest Cost

£6,150 (compounded)

net Proceeds

£193,850 (from £200k sale)

advance Received

£200,000

total Cost To Repay

£200,000 (interest paid from proceeds)

3
Retained/Deducted Interest

interest Cost

£6,150

net Proceeds

Full loan amount - £6,150

advance Received

£193,850

total Cost To Repay

£200,000

Bridge £500,000 for 12 months at 0.55% monthly

1
Monthly Serviced Interest

interest Cost

£33,000 (£2,750/month)

net Proceeds

Full loan amount

advance Received

£500,000

total Cost To Repay

£500,000 + £33,000 in monthly payments

2
Rolled-Up (Compounded) Interest

interest Cost

£34,500 (compounded)

net Proceeds

£465,500 (from £500k sale)

advance Received

£500,000

total Cost To Repay

£500,000 (interest paid from proceeds)

3
Retained/Deducted Interest

interest Cost

£34,500

net Proceeds

Full loan amount - £34,500

advance Received

£465,500

total Cost To Repay

£500,000

Cashflow Impact Comparison

How each interest option affects your monthly and overall cashflow

Interest Type6-Month Impact12-Month ImpactCashflow EffectBest When
Monthly ServicedMust budget £1,000/month (total £6,000)Must budget £1,000/month (total £12,000)Requires ongoing cashflow managementYou have regular monthly income
Rolled-UpNo monthly payments, pay £6,150 at exitNo monthly payments, pay £12,650 at exitImproves monthly cashflow, lump sum at endYou have uncertain monthly income but certain exit
RetainedNo ongoing costs, interest deducted upfrontNo ongoing costs, interest deducted upfrontBest for monthly cashflow, lowest net advanceYou need maximum monthly cashflow

Lender Preferences & Rate Impact

Different lenders have different preferences for interest payment methods. This affects the rates they'll offer you.

Traditional Bridge Specialists

Preferred Method:

Monthly Serviced or Rolled-Up

Why They Prefer It:

They prefer monthly income or clear exit with accrued interest. Monthly payments reduce their risk exposure.

Rate Impact:

Standard rates (0.50-0.70% monthly)

Development Finance Specialists

Preferred Method:

Rolled-Up Interest

Why They Prefer It:

They understand development timelines and prefer not to disrupt project cashflow with monthly payments.

Rate Impact:

Slightly higher rates (0.55-0.75% monthly) for rolled-up option

Short-Term Lenders

Preferred Method:

Retained/Deducted or Monthly

Why They Prefer It:

They prefer interest paid upfront or monthly to reduce risk on short loans.

Rate Impact:

Competitive rates, similar across options

Large Commercial Lenders

Preferred Method:

Monthly Serviced

Why They Prefer It:

Institutional money prefers monthly servicing patterns similar to mortgages.

Rate Impact:

Best rates for monthly option, premium for rolled-up

How to Choose the Right Interest Option

Choose Monthly Serviced If:

  • You have steady monthly income or rental cashflow to cover interest payments
  • You want the lowest total cost over the loan term
  • You want to secure the best interest rates from lenders
  • You're working with traditional institutional lenders
  • You want predictable, mortgage-style payments

Choose Rolled-Up Interest If:

  • You're doing construction/development with uncertain monthly cashflow
  • You need maximum monthly capital for project costs and contingencies
  • You have a clear, certain exit strategy (sale of developed property)
  • The slightly higher total cost is worth the monthly cashflow benefit
  • You're working with development-focused specialist lenders

Choose Retained/Deducted Interest If:

  • You have a very short loan term (3-6 months) with certain exit
  • You want absolute clarity on total costs upfront
  • You need no ongoing interest management or cashflow tracking
  • You're comfortable with receiving less upfront capital
  • You want the simplest, most transparent fee structure

Frequently Asked Questions

Get answers to the most common questions about bridging loans

Monthly serviced: you pay interest each month (lower total cost), improving lender confidence. Rolled-up: interest accumulates and is paid when you exit (higher total due to compounding), but improves your monthly cashflow. For a £200k loan over 6 months at 0.50%: monthly = £6,000 total cost with £1,000 payments; rolled-up = £6,150 total cost but no monthly payments. The key trade-off is monthly cashflow vs. total cost.
Yes, rolled-up is ideal for developments. You avoid monthly £1,000+ payments, keeping that capital for construction, materials, labour, and contingencies. The slightly higher total interest cost (compounding) is often worth the improved project cashflow. However, ensure your exit strategy will cover the accrued interest - if your development sale is £50k lower than expected, you may not have enough to cover the loan and interest.
Retained interest is better if you want absolute certainty on costs and have a very short loan term. For example, a 3-month auction bridge where you know exact exit and want no surprises. However, you receive less upfront capital (£193,850 instead of £200k), which hurts for larger projects. Rolled-up is more flexible - same upfront capital, similar total cost, but you keep more proceeds if you exit early. For most situations, rolled-up is superior to retained.
Monthly serviced: you stop paying interest when you repay, so early exit saves money. Rolled-up: interest has already compounded for the full term, so early exit may not save money (depends on lender terms). Retained: early exit saves nothing - you've already paid interest for the full term upfront. Always ask your lender about early repayment terms - some offer interest refunds or rebates for early exit.
Lenders generally prefer monthly serviced (reduces their risk) but they'll offer all three options. Your choice affects the interest rate offered - rolled-up typically costs 0.05-0.10% more monthly than monthly serviced, reflecting higher risk. For example: monthly serviced at 0.50%, rolled-up at 0.55-0.60%. Ask your broker (or FastBridge Funding) to get quotes for all three options so you can compare true total costs.
Monthly serviced: you continue paying monthly interest, fairly straightforward. Rolled-up: you may owe accrued interest for the extended period, increasing your total cost. Retained: depends on lender - you may pay additional interest for the extension. Always confirm your lender's extension policy upfront. For uncertain timelines, monthly serviced is safest as you don't face surprise compounding interest.
Generally no - interest type is set at the beginning and locked in. You cannot switch from monthly to rolled-up halfway through. However, when you refinance or extend the loan, you might negotiate different terms. Always think through your cashflow for the full expected loan term before committing to an interest type.
Monthly: (monthly rate % × loan amount × number of months). Rolled-up: use compound interest formula or ask your lender for an illustration. Retained: (monthly rate % × loan amount × number of months) deducted upfront. Get exact figures from lenders before deciding. FastBridge Funding can calculate this for you and show comparisons across 100+ lenders - we ensure you're comparing true total costs.

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