Affordability
Working out what you can afford to repay
The amount you can borrow and the amount you can comfortably repay are not always the same. Here is how to work out the difference before you apply.
Written by the UKPayday editorial team
Updated 11 July 2026
11 min read
The short version
- What you can borrow and what you can repay are not the same.
- Budget from money that actually reaches your account.
- Include annual costs and keep a safety margin.
- If it only works in a perfect month, it is too tight.
The amount you can borrow and the amount you can comfortably repay are not always the same.
A lender may be willing to consider a certain loan amount, but that does not mean the repayments will suit your budget. Before applying, you should look at what comes in, what must go out and what could change during the loan term.
The aim is not to find the largest repayment you can possibly make. It is to find a payment you can make on time without falling behind on essential bills, using another form of credit or leaving yourself with too little money for normal life.
What affordable really means
A repayment is affordable when you can make it by the due date while still paying your other important commitments.
You should be able to cover your rent or mortgage, Council Tax, energy, food, travel, childcare and existing debts. You should also have enough left for reasonable everyday costs and unexpected expenses.
If making the payment means missing another bill, borrowing again or going without essentials, the loan is not affordable.
This is also central to the Financial Conduct Authority rules on creditworthiness. Lenders must consider whether a customer can repay without having to borrow again, missing other contractual or legal payments or suffering a significant negative effect on their financial position. You can read the full requirements in the FCA creditworthiness rules.
Your calculation does not replace the lender's assessment. It helps you decide whether applying makes sense before you reach that stage.
Start with the money you actually receive
Begin with your regular income after tax and other deductions. This is the money that reaches your bank account, not the larger figure shown as your salary before deductions.
Your income could include wages, benefits, pension income, maintenance payments or another regular source that you are allowed to use.
Only include income you can reasonably expect to receive throughout the loan term. Overtime, bonuses, commission and casual work may not be reliable every month. If these amounts change, use a cautious average or base the calculation on your lower income months.
Do not count a payment that has not been confirmed. A possible pay rise, expected bonus or extra shift should not support a repayment until you know it will happen.
List your essential spending
Next, write down the costs that must be paid each month. Use recent bank statements, bills and account records rather than relying on memory.
Your essential spending may include:
- Rent or mortgage payments
- Council Tax
- Gas, electricity and water
- Food and household items
- Travel to work or education
- Fuel, insurance and essential vehicle costs
- Childcare and child maintenance
- Phone and internet services you need
- Insurance
- Medical and care costs
- Existing loan, card and finance repayments
- Payments required by a court or public body
Use honest figures. Cutting a food budget on paper does not make a repayment affordable if the lower amount is unrealistic.
Some bills have more serious consequences when they are not paid. These are often described as priority bills or priority debts. Rent, mortgage payments, Council Tax and energy are common examples. They must come before a new unsecured loan repayment.
MoneyHelper provides a useful guide to prioritising debts if you are unsure which payments need attention first.
Include costs that do not arrive every month
A monthly budget can look healthier than it really is when annual and irregular costs are left out.
Think about car servicing, repairs, school clothing, birthdays, Christmas, dental treatment, home maintenance, insurance renewals and other predictable costs. These expenses may not happen this month, but they still need to be paid.
Add up what you expect to spend on them over a year and divide the total by 12. Put that monthly amount into your budget.
For example, if vehicle servicing, repairs and insurance excesses are likely to cost £600 over a year, allow £50 each month. The money may remain in your account for several months, but it is not truly spare.
Allow for everyday life
Affordability is not based on whether you could survive on the smallest possible amount for a few weeks.
People need clothing, toiletries, basic social activity and money for small costs that cannot always be predicted. A budget that removes every flexible expense is unlikely to remain workable for long.
Look at what you normally spend and decide what can genuinely be reduced. A subscription you rarely use may be easy to cancel. Food, heating and travel may be much harder to cut. If you set a budget you have never managed before, test it for a full month before relying on it.
Keep a safety margin
The money left after your planned spending is not automatically the amount you should commit to a loan repayment.
Prices change. A work shift can be cancelled. A car can need a repair. A school or household cost can appear without warning.
Keep part of your remaining income as a safety margin. There is no single figure that suits every household. The right amount depends on how stable your income is, whether you have savings and how easily you could deal with an unexpected cost.
If your budget only works when every month goes perfectly, the repayment is too close to your limit.
A simple affordability calculation
You can use this basic calculation:
The amount left is the most you could consider available. It is not a target or a guarantee that a lender will approve an application.
Choosing a repayment below this figure gives you more room if your circumstances change.
A worked example
Imagine someone receives £1,900 each month after tax.
Their rent, Council Tax and household bills total £850. Food and essential travel cost £350. Existing credit payments are £150. They allow £100 for annual and irregular costs, £150 for normal personal spending and £150 as a safety margin.
The calculation would be:
This does not mean a £150 loan repayment is automatically suitable. It is the estimated amount left after the costs included in the calculation. A smaller payment would provide more protection, and the person should check whether any costs have been missed.
The example is only a method. It is not a recommended budget and will not reflect every household.
Test the repayment against a difficult month
Do not test the figure only against an average month. Ask what would happen in a more expensive one.
Could you still make the repayment if your energy bill increased, you had to pay for a repair or your income was slightly lower?
If the answer is no, reduce the proposed repayment or reconsider borrowing.
You can also practise the payment before applying. Move the same amount into savings on the date the repayment would be due. If this causes problems during the month, a real repayment is likely to do the same. The money remains yours.
Check the full loan cost
A lower monthly payment does not always mean a cheaper loan. Extending the term can reduce each payment but increase the total interest paid.
Before agreeing to a loan, check:
- The amount borrowed
- The repayment amount
- How many repayments are required
- The payment dates
- The interest rate
- The APR
- The total amount repayable
- Any fees or charges that may apply
The total amount repayable tells you how much the borrowing will cost if the agreement runs as planned. APR can help with comparisons, but you should also compare the actual payments and total cost.
Match the payment date to your income
Timing matters. A repayment may fit your monthly budget but still create a problem if it leaves your account before your wages arrive.
Check the exact payment date and how often payments will be collected. If you are paid every four weeks but bills are collected monthly, the dates will move in relation to each other.
If the lender allows a suitable payment date to be selected, choose one soon after your regular income is normally received.
Be careful with variable income
Affordability needs extra care when earnings change from month to month.
Review several months of income and spending. Include quiet periods, unpaid time, seasonal changes and business costs if you are self employed.
Base the repayment on a lower normal month, not your best month. Money earned in a strong month can be kept as a buffer for weaker ones.
If there is no dependable amount left after essentials during quieter months, a fixed loan repayment may not be suitable.
Consider changes during the loan term
Your budget today may not be your budget in six months.
Think about changes you already know are likely. These could include the end of overtime, a move, parental leave, benefit changes, a rent increase, a new childcare cost or the end of a fixed energy tariff.
If a likely change will affect your ability to repay during the agreement, include it now. A loan should fit the whole term, not just the first payment.
Warning signs that a repayment is not affordable
Stop and review the plan if you would need to:
- Borrow again to make a repayment
- Miss rent, Council Tax, energy or another essential bill
- Use an overdraft every month to cover normal costs
- Depend on unconfirmed overtime or bonuses
- Use money set aside for food or travel
- Reduce essential spending to an unrealistic level
- Take a larger loan just to clear other borrowing without a clear repayment plan
These are signs that new credit may make the position harder to manage.
The lender still completes its own assessment
Your budget is your personal check. A lender must make its own creditworthiness and affordability assessment before deciding whether to offer credit.
It may consider your income, spending, debts, credit history, requested amount and loan term. It may ask for documents or use other information to check your details.
Give complete and accurate information. Understating bills or overstating income may lead to a payment that does not fit your real circumstances.
Approval does not remove the need to make your own decision. You know more about your upcoming expenses than a credit file can show.
How UKPayday fits into the process
UKPayday is a credit broker, not a lender. We search a panel of participating lenders and brokers rather than the whole market.
Our service may help you look for a potential loan option, but UKPayday does not approve applications, provide funds, set the interest rate or decide what you can afford. The lender makes the final decision and completes its own checks.
If you receive an offer, read the terms carefully. Check the repayment amount, dates, loan term and total amount repayable before accepting it. You are not required to continue simply because a potential match has been found.
If the figures do not work
If there is no reliable amount left after essential costs, another loan is unlikely to improve the situation.
Do not adjust honest figures to make an application fit. Review spending, check whether you are receiving all available support and contact existing creditors early if you expect to miss a payment.
Free debt advice is available. MoneyHelper can help you find an appropriate service and offers a free budget planner to help you understand where your money goes.
Asking for help early gives you more options. You do not need to wait until a payment has already been missed.
The final check
An affordable repayment leaves room for more than the loan itself.
You should still be able to pay essential bills, meet existing commitments, cover reasonable living costs and deal with an unexpected expense. The payment should remain manageable in an ordinary month and a more difficult one.
Use real figures, allow for costs that are easy to forget and leave a safety margin. If the repayment only works on paper, it does not work.
Borrow only when you understand the full cost and are confident that every scheduled payment can be made without creating a new financial problem.
Warning: Late repayment can cause you serious money problems. For help, go to MoneyHelper.
This guide is general information, not financial advice. Representative 79.5% APR variable. Borrow £1,000 over 18 months, 18 monthly repayments of £89.22, total amount repayable £1,605.96, interest £605.96, annual interest rate 59.97% fixed.
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