2026-09-21 7 min read

Personal Loan Comparison Calculator

Two offers priced side by side on cost, not just payment for a personal loan. Live calculator with worked steps, charts.

Calculator

Loan Amount Help

The amount you borrow, before fees are deducted.

Payment Frequency

Option A — Interest Rate(%)

Option A — Term(years)

years

Option B — Interest Rate(%)

Option B — Term(years)

years

Advanced options (1)

Flat Fees & Closing Costs

This personal loans calculator runs on the standard amortisation model: interest is charged on the outstanding balance each month, and anything extra you enter is applied to principal immediately.

Break-even

The options differ by $98.80 per month; any upfront fee difference is recovered in 0.0 payments.

Results

Normal

Option A — Payment

$360.94/month

7.25% over 4 years.

Option B — Payment

$459.74/month

6.50% over 3 years.

Monthly Difference

$99

Option A — Total Interest

$2,325

Option B — Total Interest

$1,550

Total Cost Difference

$774

Option B is cheaper overall.

Option A — All-In Cost

$2,575

Option B — All-In Cost

$1,800

Cheaper Option

Option B

Saves $774 over the full term.

Live results update as you type — currently showing option a — payment of $360.94 /month on 12 payments a year. Replace the defaults with your own quote for an exact comparison.

Visualizations

All-In Cost by Option

2,575Option A

1,800Option B

Option A vs Option B — Total Interest

Option A interest60%

Option B interest40%

Formula

Pricing two offers on the same amount and adding their fees produces an all-in cost for each, which is the only fair way to compare different rate and term combinations.

Cost(option) = Payment × n − Amount + Fees

Variables

Symbol	Name	Unit	Description
Payment	Payment per period	currency	Level payment under each option
n	Number of payments	count	Term under each option
Fees	Upfront cost	currency	Fees payable under each option

Explanation

This is which of the two offers costs less in total once payments and fees are both counted.

Step-by-Step Calculation

Follow each step to understand how the result is calculated from your inputs.

Step 1

Price both offers on the same amount using their own rate and term.

P = A × i ÷ (1 − (1 + i)^−n)

Option A:7.25% / 4 years

Option B:6.50% / 3 years

Result: A: $360.94 /month · B: $459.74 /month

Step 2

Total the finance charge for each option.

Interest = payment × n − amount

Intermediate: A: $2,325 · B: $1,550

Result: Difference $774

Step 3

Add upfront fees to get the all-in cost and choose the cheaper structure.

All-in cost = interest + fees

Fees (both options):$250

Result: Option B — $1,800

Final Answer

$360.94

Worked Examples

See how the calculator works with different scenarios.

Scenario

The personal loan comparison calculator run on the values above, showing the full calculation path rather than only the answer.

Inputs

Amount:15000

Frequency:monthly (12 per year)

Calculation

1. Price both offers on the same amount using their own rate and term. → A: $360.94 /month · B: $459.74 /month 2. Total the finance charge for each option. → Difference $774 3. Add upfront fees to get the all-in cost and choose the cheaper structure. → Option B — $1,800

Result

Option A — Payment: $360.94 /month

Interpretation

Option B costs $1,800 against $2,575: a $774 difference (5.2% of principal).

Understanding Your Result

Your Result: Option A — Payment: $360.94 /month

What This Means

This is which of the two offers costs less in total once payments and fees are both counted.

Why It Matters

Option B costs $1,800 against $2,575: a $774 difference (5.2% of principal).

Professional Interpretation

Option B costs $1,800 against $2,575: a $774 difference (5.2% of principal).

How this is calculated

Pricing two offers on the same amount and adding their fees produces an all-in cost for each, which is the only fair way to compare different rate and term combinations.

What drives the result

Any structure that delays principal repayment keeps the balance higher for longer, and because interest is charged on the balance, the total cost rises. Conversely, anything that accelerates repayment — a shorter term, an extra principal payment, a faster frequency — lowers the average balance and therefore the finance charge.

Recommendations

•A lower payment from a longer term almost always costs more overall — compare both lines, not just the payment.
•Add the value of fees you would pay upfront in cash, not just the financed ones, before deciding.

Educational Content

Introduction

Loan structure determines when cash leaves your account and how much flexibility you keep. Interest-only periods, balloons, deferred starts, graduating payments, refinancing and biweekly schedules all change the timing of principal repayment without changing the formula behind it. This page prices the structure, not just the rate.

Concept Explanation

Applications

▸Choosing between a lower payment now and a lower total cost

▸Testing whether refinancing or restructuring is worth the fees

▸Planning around a balloon, a reset date or the end of a promotional period

▸Deciding how much extra to pay and whether it is better used to invest

Benefits

•Prices structures that are hard to compare by eye
•Shows the payment step-up or lump sum you must plan for
•Quantifies the break-even point on any restructuring cost
•Separates cash-flow relief from genuine savings

Limitations

•Assumes rates, income and repayment behaviour stay as entered
•Lender-specific rules (recast fees, minimum payments, penalties) are not automatic
•Tax treatment of interest, penalty and forgiven amounts is not included
•Real-life events such as a sale or refinance can change the outcome entirely
•Break-even: The options differ by $98.80 per month; any upfront fee difference is recovered in 0.0 payments.

Best Practices

•Match repayment to the life of the asset being financed
•Write down the exit plan for any balloon or reset before signing
•Compare structures on total cost over the horizon you will actually hold
•Keep a cash buffer instead of pushing every dollar into principal

Common Misconceptions

Myth: A lower payment is always a win

Truth: Lower payments usually mean more periods and more interest unless the rate falls enough to compensate.

Myth: Structures are set in stone

Truth: Many loans allow recasting, extra payments or rate renegotiation — ask before assuming.

Practical Tips

•Put both offers on the same amount, term and payment frequency before comparing.
•Add the value of any fees paid in cash to the cost of that option.

Common Mistakes

Comparing monthly payments only

A longer term always lowers the payment and usually raises the cost.

Ignoring fees that differ between offers

Fee structure is often the deciding factor when the rates are close.

Assumptions

This calculator makes the following assumptions to provide estimates:

Both offers are held to maturity: Early payoff or refinancing changes the ranking.

Limitations

Be aware of these limitations when using this calculator:

Limitation: Assumes rates, income and repayment behaviour stay as entered

Limitation: Lender-specific rules (recast fees, minimum payments, penalties) are not automatic

Limitation: Tax treatment of interest, penalty and forgiven amounts is not included

Limitation: Real-life events such as a sale or refinance can change the outcome entirely

Frequently Asked Questions

Answers to common questions about this calculator.

Which matters more, rate or term?

Term usually dominates: extending a five-year loan to seven years costs more than most rate differences save.

How do I compare a fixed rate with an introductory rate?

Model the introductory period at the promotional rate and the remainder at the realistic post-promotion rate, then compare the all-in costs.

Who uses the personal loan comparison calculator?

It is used by borrowers comparing personal loan offers, by advisers checking a quote before a client signs, and by lenders and brokers sanity-checking a payment, ratio or fee structure. It sits in the Personal Loans group of the Loans & Lending section of Atlascalcs.

How accurate is the personal loan comparison calculator?

Every figure follows directly from the inputs using standard amortisation mathematics, so it is accurate to the quality of the values you enter. Lenders round payments and apply their own day-count conventions, so expect small differences against a formal statement or payoff quote.

How current are the rates and thresholds used here?

The calculator uses the figures you enter, so update the rate to your actual offer or current market quote. Ratio thresholds, poverty guidelines and programme rules reflect the conventions described in the references and change periodically.

Does rounding change the results?

Every calculation runs on full precision and rounds only for display. Lenders round payments to the nearest cent or dollar, so expect a small difference between these figures and a formal statement or payoff quote.

Should I use the payment or the total cost to compare offers?

Use the payment to judge cash flow and the finance charge or APR to judge cost. When two offers differ on both, the all-in cost over the period you expect to hold the loan is the decisive measure.

Can I use this calculator for a business or commercial loan?

Yes. The payment, amortisation, ratio and cost calculators apply the same amortisation mathematics to commercial loans; the difference is in the fees, covenants and collateral rules, which you should enter explicitly.

What information should I have ready before applying?

Your exact rate and term, the fee schedule, any required add-ons, and your gross income and existing monthly obligations. With those five numbers every figure on this page can be tied back to a lender quote.

Related Calculators

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Related Guides

Deepen your understanding with these educational resources.

Loan repayment and amortisation guide

How payments split between interest and principal, and how to read a schedule.

Borrowing cost and APR explained

Rate versus APR, points, fees and the cost of a longer term.

Qualifying for credit

The ratios lenders use, and how to improve each one before applying.

Glossary

Technical terms used in mortgage calculations explained in plain language.

APR (Annual Percentage Rate): The yearly cost of credit expressed as a rate, including interest and most upfront finance charges.
Finance charge: The total dollar cost of credit, including interest and certain fees.
Origination fee: A charge levied by the lender for arranging the loan, usually a percentage of the amount financed.
Break-even point: The point at which savings from a financial change equal the costs of making it.

Authoritative References

Trusted sources and standards referenced by this calculator.

Consumer Financial Protection Bureau — Loan options and disclosures Consumer Financial Protection Bureau — What is a debt-to-income ratio? Federal Reserve — Consumer credit (G.19) statistical release Federal Reserve — Consumer credit and leasing guides U.S. Small Business Administration — Loan programmes Federal Student Aid — Income-driven repayment plans Federal Student Aid — Public Service Loan Forgiveness Federal Trade Commission — Consumer credit guidance

Applicable Standards

Level-payment (simple-interest) amortisation, payments assumed in arrearsAPR computed by discounting the actual payment stream to net proceedsDebt ratios computed on gross income for lender comparisonsMoney rounded for display only; all calculations run at full precision

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Page Information

Last Updated:

2026-09-21

Version:

2.0.0

References:

License:

Free to use for educational and professional purposes.