Auction finance calculator
Enter the purchase price, deposit, an example monthly rate, a term and fees to estimate the cost of a bridging loan for an auction purchase. The calculator is coming soon.
Reviewed by David Sampson, Founder & Director · Created 20 October 2026 · Last reviewed 20 October 2026
How an auction finance calculator works
An auction finance calculator estimates the cost of a short-term loan for an auction purchase from the price, the deposit, a monthly interest rate, the term and fees entered by the user. It shows the loan amount, the interest over the term and the total to repay at the end, with no credit search.
Running the same purchase over a longer term shows how a delay in works or refinancing adds to the cost.
Choosing figures to test
The rate entered should come from a dated quote or a lender's current range for a similar lot and loan-to-value. Bridging used for auctions is usually priced monthly, and interest is often rolled up or retained rather than paid each month. Testing a few rates and terms shows how sensitive the total cost is.
The deposit paid on the day, buyer's fees and the cost of any works should be included when checking how much cash the purchase needs.
Using the results
The result is an estimate based on the figures entered. A lender's offer depends on its valuation, its review of the legal pack and its view of the exit, and it may lend less than the calculator suggests. Arrangement, valuation, legal and exit fees change the total, so they should be entered where known.
Comparing brokers who arrange auction finance is a common next step.
Frequently asked questions
Does the calculator affect my credit score?
No. It does not search a credit file.
Can it tell me if a lender will fund the lot?
No. Lenders decide after valuation and legal checks.
What rate should I enter?
A monthly rate from a dated quote for a similar lot and loan-to-value.
Does it include fees?
Yes, where they are entered as figures.
Can it estimate an auction mortgage instead of bridging?
It is set up for short-term loans. Long-term repayments suit a mortgage calculator.
Does it work for a refurbishment lot?
Yes, as an estimate, if the works budget is added to the cash needed.
Important: Your home may be repossessed if you do not keep up repayments on your mortgage. Information on this page is for general guidance only and does not constitute financial advice.Always verify details directly and seek independent advice before making financial decisions.