Secured loan affordability calculator

A secured loan affordability calculator is a tool that gives you an early indication of whether a secured loan repayment might fit within your budget, before you go through a full application. It works by comparing an estimated monthly repayment against your income, your existing mortgage payment, and your other financial commitments.

This is different from checking your eligibility with a specific lender. An affordability calculator gives you a general picture based on the same principles lenders use, but it can't replace a full assessment, which looks at your bank statements, credit file, and personal circumstances in detail.

Using a calculator before you apply helps you avoid spending time on applications that are unlikely to succeed, and gives you a realistic starting point for a conversation with an advisor.

When you apply for a secured loan, sometimes called a homeowner loan or second charge mortgage, the lender carries out a full affordability assessment before making a decision. This goes well beyond a quick calculation and is a requirement of the Financial Conduct Authority's rules for second charge lending.

Lenders typically look at:

• Your income - verified through payslips, tax returns, or an accountant's certificate if you're self-employed
• Your outgoings - including your mortgage, existing loans, credit cards, and essential living costs such as council tax, utilities, and childcare
• Your credit history - how you've managed borrowing in the past, including any missed payments or defaults
• The equity in your property - the amount you want to borrow plus your existing mortgage balance, compared to your property's value

Lenders also stress-test your application, checking whether you could still afford repayments if your circumstances changed or costs increased. This protects both you and the lender from taking on borrowing that could become unmanageable.

Lenders build a detailed picture of your income and outgoings before deciding how much you can afford to borrow. Most use a standard income and expenditure form, though the exact categories vary between lenders.

Income lenders consider

• Basic salary or wages
• Regular overtime, bonuses, or commission, usually averaged over several months
• Self-employed income, evidenced through tax returns or accounts
• Pension income
• Benefit income, where accepted by the lender
• Rental income from other properties, if applicable

Outgoings lenders consider

• Your existing mortgage payment
• Other loan and credit card repayments
• Childcare costs
• Council tax, utilities, and insurance
• Any maintenance payments or other financial commitments

Being upfront about every outgoing matters. If you leave something out, the lender is likely to spot it when they check your bank statements, which can slow down your application and affect the lender's confidence in the rest of the information you've provided.

Your debt-to-income ratio (DTI) compares your total monthly debt repayments to your gross monthly income, expressed as a percentage. It's one of the key measures lenders use to assess secured loan affordability.

• A lower DTI generally means more lenders are likely to consider your application
• A moderate DTI may still be accepted, but the lender is likely to look more closely at your other circumstances
• A high DTI can make it harder to demonstrate affordability, and you may need to speak to a specialist lender

DTI is only one part of the picture. Lenders also weigh up your credit history, employment stability, and the equity in your property alongside this figure.

Because a secured loan sits alongside your existing mortgage as a second charge, lenders always look at your current mortgage balance and payment as part of the affordability assessment.

The more you're already committed to paying each month, the less room there is for a new secured loan repayment within an affordable budget. This is why lenders add your proposed secured loan payment to your existing mortgage payment and other debts, rather than assessing the new loan in isolation.

Your property's equity also plays a part. The amount you want to borrow, combined with your outstanding mortgage balance, is compared to your property's value to work out your loan-to-value (LTV) ratio. A lower LTV, meaning you're borrowing a smaller proportion of your home's value, can support a stronger affordability position.

Your home may be repossessed if you do not keep up repayments on your mortgage or any other debt secured on it.

If a calculator result suggests a secured loan might be a stretch, there are steps you can take before applying that may improve your position.

• Pay down existing credit card balances where possible, as high balances count against your affordability
• Avoid taking on new credit commitments in the months before you apply
• Check your credit file for errors and get them corrected
• Gather accurate income evidence, including two or three years of accounts if you're self-employed
• Consider a longer loan term to reduce the monthly repayment, though this increases the total amount you repay overall

An advisor can look at your full circumstances and explain which of these steps would make the biggest difference to your application before you commit to anything.

If you're worried about your existing debts or unsure whether extra borrowing is the right step, MoneyHelper offers free, independent guidance. You can reach them at moneyhelper.org.uk or by calling 0800 138 7777.