UK Equity Loan Calculator
Estimate how much you could borrow against your home's equity and what your monthly repayments may look like.
How to use this equity loan calculator UK homeowners can rely on
This calculator is built for people in the UK who want a quick, practical estimate of borrowing against home equity. You enter your property value, your remaining mortgage, the percentage you hope to borrow, and an estimated interest rate. In seconds, you get a repayment estimate and a sense of whether your target loan is realistic under common combined loan-to-value (CLTV) limits.
It is designed for planning, not as a formal lending quote. Lenders and brokers will still run credit checks, affordability checks, and full underwriting before confirming any offer.
What is an equity loan in the UK?
In everyday UK usage, people often mean one of two things when they search for an “equity loan calculator”:
- A loan secured against your home (often called a second charge mortgage or homeowner loan).
- A Help to Buy equity loan repayment calculation for properties originally purchased under that scheme.
This page focuses on the first case: borrowing against home equity through a secured loan. If you are dealing with Help to Buy redemption, you usually need a valuation and a separate repayment figure process, because the amount due is linked to a percentage of current property value.
How this calculator works
1) It checks your available equity
Available equity starts with:
Property Value − Outstanding Mortgage
If your home is worth £350,000 and your current mortgage is £180,000, your gross equity is £170,000.
2) It applies your target loan percentage
If you request 15% of a £350,000 property, that is a target equity loan of £52,500.
3) It applies maximum combined LTV limits
Most lenders set a cap on the total borrowing against a property. For example, if your lender allows 85% CLTV:
Max total debt = 85% × property value
Max new loan = Max total debt − outstanding mortgage
If your requested loan exceeds this, the calculator automatically caps the estimate and tells you why.
4) It estimates monthly repayments
The tool uses a standard amortisation formula based on APR and term. It returns:
- Estimated loan amount
- Estimated monthly repayment
- Total repayment over term
- Estimated total interest
- Estimated CLTV after borrowing
Example scenario
Suppose your details are:
- Property value: £400,000
- Outstanding mortgage: £240,000
- Wanted equity loan: 20%
- Lender CLTV limit: 85%
- APR: 8.0%
- Term: 12 years
Your requested loan would be £80,000. But 85% of £400,000 is £340,000 total debt allowed. With an existing mortgage of £240,000, the estimated maximum additional loan is £100,000. In this case, your £80,000 request is within limit, so repayment figures are calculated on the full requested amount.
Costs to consider beyond the headline rate
When comparing secured loans, don’t stop at APR alone. Total borrowing cost may include:
- Arrangement or completion fees
- Broker fees
- Valuation fees
- Legal/admin fees
- Early repayment charges
This is why the calculator includes an optional fee field: it gives a more realistic overall picture of cost.
Second charge loan vs remortgage: which is better?
Many homeowners compare a second charge equity loan with a remortgage. There is no one-size-fits-all answer:
- Second charge loan may be useful if your current mortgage deal is excellent and you want to avoid early repayment charges on the main loan.
- Remortgaging may be cheaper overall if market rates and fees work in your favour.
A whole-of-market mortgage broker can model both routes based on your income, credit profile, and property details.
Frequently asked questions
How much equity can I borrow in the UK?
It depends on your lender’s CLTV cap, your income and outgoings, and your credit history. Many deals sit around 75% to 90% CLTV for total borrowing, but criteria vary by lender.
Is this the same as Help to Buy equity loan repayment?
Not exactly. Help to Buy repayment is tied to a percentage of your home’s current market value, not just a standard fixed-balance loan repayment model.
Will this calculator affect my credit score?
No. It’s an on-page estimate tool with no credit search.
Can I repay early?
Some lenders allow overpayments or early settlement, but charges may apply. Always review your offer documents and key facts illustration.
Smart borrowing tips before you apply
- Keep your CLTV as low as possible for better rates.
- Check affordability under higher interest assumptions.
- Compare at least three lender scenarios.
- Include all fees, not just monthly payment.
- Avoid borrowing for short-term spending unless absolutely necessary.
Important: This page is for educational and planning purposes only and does not constitute financial advice. For regulated mortgage advice in the UK, speak to an FCA-authorised broker or lender.