Loan Comparison Calculator
Compare two loan offers side by side, see the variance between every repayment element, and inspect the monthly breakdown on an interactive graph.
Loan inputs
Enter the amount, interest rate and term in months for each loan. Optional fees and monthly overpayments are included in the side-by-side variance.
Loan A
ALoan B
BSide-by-side summary
These headline cards tell you which offer is cheaper each month, which costs less overall, and how much variance there is between the two deals.
| Pay element | Existing Loan | Alternative Loan | Variance (B - A) |
|---|---|---|---|
| Loan amount | £0.00 | £0.00 | £0.00 |
| Interest rate | 0.00% | 0.00% | 0.00% |
| Chosen term | 0 months | 0 months | 0 months |
| Actual payoff term | 0 months | 0 months | 0 months |
| Monthly repayment | £0.00 | £0.00 | £0.00 |
| Extra overpayment | £0.00 | £0.00 | £0.00 |
| Upfront fee | £0.00 | £0.00 | £0.00 |
| Total interest | £0.00 | £0.00 | £0.00 |
| Total repayable | £0.00 | £0.00 | £0.00 |
| First 12 months interest | £0.00 | £0.00 | £0.00 |
| First 12 months principal repaid | £0.00 | £0.00 | £0.00 |
| Balance after 12 months | £0.00 | £0.00 | £0.00 |
| Total cost per £1,000 borrowed | £0.00 | £0.00 | £0.00 |
Balance graph
Watch the remaining balance for both loans fall month by month. This makes it easy to see which deal repays faster and where the curves begin to separate.
Monthly breakdown
Review the amortisation breakdown side by side. You can switch between the first 12 months, 24 months, 60 months or the full term.
| Month | Payment A | Interest A | Principal A | Balance A | Payment B | Interest B | Principal B | Balance B | Balance variance |
|---|---|---|---|---|---|---|---|---|---|
| 1 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 |
Loan Comparison Calculator: Compare Two Loans Side by Side
If you are choosing between two borrowing options, a loan comparison calculator can help you understand which deal may cost less overall. Instead of comparing headline rates alone, you can review two loans side by side and see how the monthly payment, total interest, fees, overpayments and full repayment term affect the total cost.
Our Loan Comparison Calculator is designed to make borrowing decisions easier. It lets you compare two loan deals in one view so you can quickly see the cost difference between Loan A and Loan B.
What a loan comparison calculator does
A loan comparison calculator helps you compare two loan offers using the details that matter most in real life, not just the advertised rate. This usually includes:
- loan amount
- interest rate
- loan term in months
- monthly repayment
- upfront fees
- extra monthly overpayments
- total interest paid
- total repayable amount
- repayment speed and balance reduction over time
Why comparing total cost matters
Two loans can look similar at first glance but work out very differently once interest, fees and term length are taken into account. A lower monthly payment can sometimes mean a longer term and more interest overall. A slightly higher monthly payment may reduce the total cost if the balance is cleared faster.
This is why a proper comparison should look at both affordability and full borrowing cost. Monthly repayment matters, but so do total interest and total repayable.
What to compare when reviewing two loans
Monthly repayment
This shows what you may need to budget each month. If one loan is significantly cheaper each month, it may feel easier to manage in the short term.
Total interest
Total interest shows how much the borrowing costs over the life of the loan. This is often one of the most important comparison points because it tells you how much extra you are paying beyond the amount borrowed.
Total repayable
This is the full amount paid back across the term, including interest and any included fees. It is one of the clearest ways to compare overall value.
Fees and charges
Some loans include setup fees or other charges. Even a deal with a lower interest rate may cost more overall if the fee structure is less competitive.
Term length
A longer term often lowers the monthly repayment but may increase the total interest paid. A shorter term can increase the monthly cost while reducing the total borrowing cost.
Overpayments
If your calculator allows overpayments, this can show how extra payments may reduce the balance faster and lower the interest paid over time.
Who should use a loan comparison calculator?
A loan comparison calculator is useful for anyone trying to compare two borrowing options clearly. This includes people looking at:
- personal loans
- debt consolidation loans
- car finance alternatives
- home improvement loans
- refinancing or replacement borrowing
It is especially useful if you already have one offer and want to compare it against another lender, another term length or a different rate.
How to use the calculator
To get the most useful result, enter the details for both loans as accurately as possible. For each loan, this normally means:
- loan amount
- interest rate
- term in months
- any upfront fee
- any extra monthly overpayment
Once both sets of figures are entered, the calculator can show the monthly repayment, total interest, total repayable and the variance between the two deals.
What the balance graph and breakdown show
A strong comparison calculator should do more than show a final number. A graph helps you see how each loan balance falls over time, while the breakdown table shows how much of each payment goes toward interest and principal.
This helps answer questions such as:
- Which loan balance drops faster?
- How much interest is paid in the first year?
- How much difference does an overpayment make?
- Which loan costs less over the full term?
Common mistakes people make when comparing loans
When comparing two loans, it is easy to focus on the wrong figure. Common mistakes include:
- looking only at the monthly payment
- ignoring fees
- not checking the full term length
- forgetting to compare total interest
- assuming a lower rate always means a better deal
A proper side-by-side calculator helps reduce these mistakes by showing the full cost structure in one place.
Why our Loan Comparison Calculator is useful
Our calculator is designed to make side-by-side borrowing comparisons simple. It shows the difference between two loans across the key repayment elements, helping users understand both monthly affordability and long-term cost.
Instead of switching between separate tools or spreadsheets, you can compare two deals in one layout and see the total cost breakdown immediately.
Frequently asked questions
Is the cheaper monthly payment always the better loan?
No. A cheaper monthly payment may come from a longer term, which can increase the total interest paid.
Should I compare fees as well as interest?
Yes. Fees can change the real cost of a loan and should always be included in the comparison.
Can overpayments reduce loan cost?
In many cases, yes. Overpayments can reduce the balance more quickly and lower the interest paid over time.
What is the most important number to compare?
That depends on your goal. If affordability matters most, focus on monthly payment. If value matters most, focus on total repayable and total interest.
Try the calculator
Use our Loan Comparison Calculator to compare two loan deals side by side and review the full cost breakdown before you borrow.