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Calculators | Fernbank Mortgage & Protection

Mortgage repayments

Estimate your monthly payment on a repayment or interest-only basis.

5 years25 years40 years
Estimated monthly payment
£0

Based on the figures you have entered.

  • Loan amount
  • Loan-to-value
  • Total repayable
  • Total interest

Results are indicative guidance only and do not constitute financial advice. Speak to an adviser for a recommendation based on your full circumstances.

How much could I borrow?

A quick view of your potential borrowing and buying power.

3.5×4.5× income5.5×
Estimated maximum borrowing
£0

Lenders each apply their own affordability rules; treat this as a guide range.

  • Buying power (loan + deposit)
  • Indicative monthly payment

Results are indicative guidance only and do not constitute financial advice. Speak to an adviser for a recommendation based on your full circumstances.

Stamp duty calculator

SDLT, LBTT and LTT for the 2025/26 tax year. Bands are reviewed each tax year.

Estimated tax due
£0

Based on the price, location and buyer status entered.

  • Tax regime
  • Effective rate
  • Price plus tax

Results are indicative guidance only and do not constitute financial advice. Speak to an adviser for a recommendation based on your full circumstances.

Overpayment calculator

See what regular overpayments or a one-off lump sum could save you.

Most UK lenders allow fee-free overpayments of up to 10% of the balance each year. Check your terms for early repayment charges.

Interest you could save
£0

Calculated month by month against your current schedule.

  • Time knocked off
  • New mortgage term

Results are indicative guidance only and do not constitute financial advice. Speak to an adviser for a recommendation based on your full circumstances.

Loan-to-value calculator

Your LTV band is one of the biggest factors in the rate you are offered.

Your loan-to-value
£0

Loan as a percentage of the property value.

  • Loan amount

Results are indicative guidance only and do not constitute financial advice. Speak to an adviser for a recommendation based on your full circumstances.

Rental yield calculator

Check whether a buy-to-let purchase stacks up before you offer.

Include letting fees, insurance, maintenance and ground rent or service charges in running costs.

Gross rental yield
£0

Annual rent as a percentage of the purchase price.

  • Annual rent
  • Net yield

Results are indicative guidance only and do not constitute financial advice. Speak to an adviser for a recommendation based on your full circumstances.

Payment holiday calculator

Understand the true cost of pausing your mortgage payments.

1 month3 months12 months

A payment holiday always needs your lender’s agreement and may affect your credit file. Interest continues to build while payments are paused.

New monthly payment afterwards
£0

Balance grows during the pause, then repays over the shorter remaining term.

  • Current monthly payment
  • Interest added during holiday
  • Extra total cost over the term

Results are indicative guidance only and do not constitute financial advice. Speak to an adviser for a recommendation based on your full circumstances.

Numbers looking good?

A calculator gives you the estimate; an adviser gets you the deal. Book a free callback and we will turn the figures into a plan.