Gross loan amount in pounds. Minimum FD Commercial bridging loan size is £250,000. Example: 500000.

Monthly interest rate as a percentage. UK bridging rates in 2026 typically range 0.55% to 1.25% per month. Private bank rates from 0.30% per month available on HNW cases. Example: 0.85 for 0.85% per month.

Loan term in months. Standard MCOB-regulated bridging caps at 12 months. MCOB 3A HNW exemption allows up to 60 months. Example: 12.

Lender arrangement fee as % of loan amount. Typical range 1% to 2%. Some specialist HNW deals run 0.5%. Example: 2 for 2%.

Lender exit fee as % of loan amount. Not all lenders charge one. Where charged, typically 0.5% to 1%. Example: 0 for no exit fee, or 1 for 1%.

How interest is paid. 'rolled' = compounds monthly, paid in full at exit (most common on HNW bridging, removes monthly outflow). 'retained' = deducted from advance upfront (borrower receives less cash on day one). 'serviced' = paid monthly out of borrower cash flow (lowest total cost but requires monthly servicing capacity).

Gross Development Value: total anticipated sales value of the completed scheme. Use comparable sales evidence, not aspirational figures. Lenders commission their own GDV via RICS. Example: 2000000.

Land purchase price. Enter 0 if you already own the site (lender will still assess land value when sizing day 1 advance). Example: 400000.

Total agreed construction cost. Should be contracted figure where possible. Example: 800000.

Professional fees as % of build cost. Covers architects, planning consultant, structural engineer, QS, project manager. Standard 10%. Example: 10.

Contingency as % of build cost. Standard 10%. Lenders may require 12-15% on conversions or complex sites. Omitting overstates profit. Example: 10.

Specific loan amount in £. Optional. If omitted, calculator uses ltc_pct of hard costs. Example: 960000.

Loan-to-cost % (used only if loan_amount_gbp is not provided). Most lenders cap at 90%; first-time developers typically 75-80%. Example: 75.

Development finance monthly interest rate. UK 2026 rates typically 0.70% to 0.95% per month. Example: 0.85.

Total finance term in months (build period + sales/refinance period). Example: 18.

Lender arrangement fee as % of loan. Standard 1.5% to 2%. Larger facilities (£5m+) often 1.0%. Example: 2.

Gross monthly rent in pounds. Use total rent for HMO and MUFB (all rooms / units combined). Example: 2500.

Loan amount being assessed in pounds. Example: 300000.

Annual product (pay) rate as a percentage. The actual rate the borrower would pay. Example: 5.5 for 5.5% per year.

Borrower structure. 'personal' uses 5.5% stress rate (HMRC tax exposure makes higher cover required). 'ltd' uses max of product rate or 5.5% (limited company SPV borrower, lower stress rate often allowed).

Property purchase price in pounds. Example: 750000.

Which UK tax regime applies. 'england' includes Northern Ireland (both use SDLT). 'scotland' uses LBTT. 'wales' uses LTT.

'residential' for dwellings (houses, flats). 'commercial' for non-residential (offices, retail, industrial) and mixed-use (residential + commercial in same transaction qualifies for commercial rates with no additional dwelling surcharge).

'standard' for main residence purchase by individual. 'ftb' for first-time buyer (England SDLT only — relief up to £625,000). 'additional' for second home or buy-to-let purchase by individual (surcharge applies). 'company' for corporate purchase (additional dwelling surcharge + flat 17% SDLT rate in England above £500,000).