Secured loan calculator estimate your monthly repayments

A secured loan calculator gives you a quick estimate of what borrowing against your property might cost each month. You enter details like the amount you want to borrow and your preferred repayment term, and the calculator applies a representative interest rate to show an approximate monthly figure.

It's a useful starting point for budgeting, but it isn't a formal quote. A secured loan calculator uses simplified assumptions, while a real lender assesses your full circumstances, including your credit history, income, and the value of your property, before confirming an actual rate.

Your home may be repossessed if you do not keep up repayments on your mortgage or any other debt secured on it, so it's worth using the calculator alongside advice from a qualified advisor rather than relying on it alone.

To get a useful estimate from a secured loan calculator, you'll typically need to know:

• Your property's current value, or a realistic estimate
• Your outstanding mortgage balance
• How much you'd like to borrow
• Your preferred repayment term
• A rough idea of your credit history, such as excellent, good, fair, or poor

The more accurate this information is, the more useful the calculator's estimate will be. If you're not sure about any of these figures, an advisor can help you work them out before you apply.

Several factors combine to determine what you'll actually pay each month if you take out a secured loan. A calculator can only account for some of these, which is why your final rate may differ from an early estimate.

The main factors lenders consider are your credit history, how much equity you have in your property, the loan amount and term you choose, and whether you opt for a fixed or variable rate. Lenders also factor in your income and existing financial commitments to check the loan is affordable for you.

The repayment term you choose has a big impact on both your monthly outgoings and the total cost of your secured loan.

Choosing a shorter term means you clear the loan faster and pay less interest overall, but your monthly repayments will be higher. A longer term spreads the same borrowing over more monthly payments, which reduces what you pay each month but increases the total interest charged across the life of the loan.

There's no universally right answer. The best term for you depends on what you can comfortably afford each month, balanced against how much you're willing to pay in total interest. An advisor can talk through the trade-offs for your specific circumstances.

Loan-to-value (LTV) compares your total borrowing, your existing mortgage plus any new secured loan, against your property's value. Most lenders cap combined LTV at around 85%, though this varies by lender and by your circumstances.

To work out your available equity, subtract your outstanding mortgage balance from your property's current value. For example, a property worth £300,000 with a £180,000 mortgage balance has £120,000 in equity. If a lender allows borrowing up to 85% LTV, your combined mortgage and secured loan could total up to £255,000, meaning up to £75,000 could potentially be available as a secured loan, subject to affordability and the lender's other criteria.

Lower LTV generally gives you access to more lenders and more competitive terms, because the lender has more security if property prices fall.

Most secured loans let you choose between a fixed rate and a variable rate, and this choice affects how predictable your calculator estimate will be over time.

With a fixed rate, your interest rate, and therefore your monthly repayment, stays the same for an agreed period, often the first few years of the loan. This makes budgeting straightforward, since you know exactly what you'll pay each month during that period.

With a variable rate, your repayment can rise or fall over time, usually in line with a reference rate such as the Bank of England base rate. A calculator estimate based on a variable rate is only accurate at the moment you run it. If rates change, your actual repayments will change too.

If predictable budgeting matters to you, ask your advisor about fixed-rate options and how long the fixed period lasts before the rate reverts to variable.

A secured loan calculator is a helpful planning tool, but it has limitations worth understanding before you rely on the figures it gives you.

• It can't confirm your actual interest rate, since this depends on a lender's full assessment of your credit history, income, and property
• It won't automatically include fees such as arrangement, valuation, or legal costs unless you add them separately
• It doesn't check affordability in the way a lender will, including your income, existing debts, and living costs
• It can't guarantee approval or the loan amount you'll actually be offered

If you're at all worried about whether a secured loan is affordable, or you're concerned about managing existing debts, free and impartial guidance is available from MoneyHelper at moneyhelper.org.uk or by calling 0800 138 7777.

Once you've got an estimate from the calculator, treat it as a starting point rather than a final figure. Here's what we'd suggest doing next.

Compare a few different loan amounts and terms to see how they affect your likely monthly repayment and total cost. Think about what you could comfortably afford each month, even if your circumstances changed, for example if your income dropped or your rate increased on a variable rate loan.

When you're ready, speak to an advisor. We compare a wide range of lenders to find options that suit your circumstances, and we'll explain the actual rate, term, and fees you'd be offered before you commit to anything. There's no pressure to proceed.