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Refinance Auto Loan Calculator with Interest Cost Comparison

Calculator Preferences
Refinance Auto Loan Calculator

This calculator will help you to decide whether or not you will save money by refinancing your car loan at a lower interest rate. Results include a line-by-line comparison of both scenarios and a bar graph that provides a visual representation of the cost comparison. The $ecret tab includes:

  • How a smaller payment may actually end up costing you money, not saving you money.
Learn More

Selected Data Record:

A Data Record is a set of calculator entries that are stored in your web browser's Local Storage. If a Data Record is currently selected in the "Data" tab, this line will list the name you gave to that data record. If no data record is selected, or you have no entries stored for this calculator, the line will display "None".

DataData recordData recordSelected data record: None
Orig loan amt:Original principal:Original loan amount:Original loan amount:

Original loan amount:

Enter the original dollar amount of the car loan (principal amount), but without the dollar sign or any commas.

Orig # pmts:Orig # of pmts:Original loan term in months:Original loan term in months:

Original loan term in months:

Enter the term (number of monthly payments) of the original car loan.

Orig payment:Original payment:Original monthly payment amount:Original monthly payment amount:

Original monthly payment amount:

Enter the monthly payment amount for the original car loan, but without the dollar sign or any commas.

# pmts made:# of pmts made:Number of payments already made:Number of payments already made:

Number of payments already made:

Enter the number of monthly payments already made on your original car loan (enter a zero if no payments have been made).

Refi rate:Refinance rate:New refinance percentage rate:New refinance annual percentage rate:

New refinance annual percentage rate:

Enter the new annual percentage rate (APR) that will apply to car loan refinance, but without the percent sign.

Refi term:Refinance term:New refinance term in months:New refinance term in months:

New refinance term in months:

Enter the new number of monthly payments that will apply to the car loan refinancing.

Refinance loan fees:

Enter the total of any refinancing fees charged by the lender. Tap the description to place a checkmark in the box if you would like the refinancing fees included in the refinance loan amount (not recommended). In either case the fees will be added to the refinancing interest cost.

Add cash:Additional cash:Additional cash needed:Additional cash needed:

Additional cash needed:

If you would like to borrow an amount over and above what you owe (not recommended!), enter the amount here, without the dollar sign or any commas.

Comparative Results
Tap the text for a description of each row result.


Based on your entries, the first column in this row is the amount you still owe on the original amount borrowed. The second column in this row is the first column plus any fees rolled into the new loan, plus any additional cash you wish to borrow when you refinance. The third column shows how much higher or lower the refinance principal is than the current principal.

Pmt:Pmt:Monthly payment:Monthly payment:Monthly payment:

Monthly payment:

Based on your entries, this row contains your current monthly payment and new refinance monthly payment. The third column shows how much higher or lower the refinance payment is than the current payment.

Rate:Rate:Interest rate:Interest rate:Interest rate:

Interest rate:

Based on your entries, the first column in this row is the estimated annual interest rate of your original car loan. The second column shows the new refinance rate you entered in the top portion of the refinance auto loan calculator. The third column shows how much higher or lower the refinance rate is than the original rate.

# pmts:# pmts:Number of payments:Number of payments:Number of payments:

Number of payments:

Based on your entries, this row shows the number of monthly payments for your current and refinanced car loan. The third column shows how much higher or lower the refinance number of payments is than the current remaining number.

Cost:Cost:Interest cost:Interest cost:Interest cost:

Interest cost and fees:

Based on your entries, the first column in this row shows how much interest you will pay if you leave your current car loan as is. The second column shows how much interest you will pay if you refinance (includes any entered refinance fees). The third column shows how much higher or lower the refinance interest and fees are than the current remaining costs. If the amount in the third column is preceded by a plus sign, you will actually lose money by refinancing your auto loan.

If you would like to save the current entries to the secure database, tap or click on the Data tab, select "New Data Record", give the data record a name, then tap or click the Save button. To save changes to previously saved entries, simply tap the Save button. Please select and "Clear" any data records you no longer need.

Feedback AppreciatedFeedback Greatly AppreciatedYour Feedback Would Be Greatly AppreciatedYour Feedback Is Greatly Appreciated


Help and Tools

Help and Tools:

This section, which you can Unstick or Hide in the Calculator Preferences (just above the top of the calculator), contains the following tabs (content too long to fit within bordered frame can be scrolled up and down):

About: Click this tab for an introduction to the calculator.

Instructions: Click this tab for step-by-step instructions for using the calculator.

Terms: Click this tab for a list of the descriptions that are located within each popup help button (info icons).

PCalc: Click this tab for a handy "pocket" calculator you can use when you need to calculate an entry needed for the calculator.

Data: Click this tab to save a set of entries or a note in between visits. Entries and notes will be stored to your web browser's local storage (if supported by your browser of choice), meaning they can only be recalled with the same device and web browser you were using when you saved them. If you'd like to save entries and notes between devices you can do so by subscribing to the Ad-Free Member Version.



Add or remove this page to/from my favorites.

Adjust Calculator Width:

Move the slider to left and right to adjust the calculator width. Note that the Help and Tools panel will be hidden when the calculator is too wide to fit both on the screen. Moving the slider to the left will bring the instructions and tools panel back into view.

Also note that some calculators will reformat to accommodate the screen size as you make the calculator wider or narrower. If the calculator is narrow, columns of entry rows will be converted to a vertical entry form, whereas a wider calculator will display columns of entry rows, and the entry fields will be smaller in size ... since they will not need to be "thumb friendly".

Show/Hide Popup Keypads:

Select Show or Hide to show or hide the popup keypad icons located next to numeric entry fields. These are generally only needed for mobile devices that don't have decimal points in their numeric keypads. So if you are on a desktop, you may find the calculator to be more user-friendly and less cluttered without them.

Stick/Unstick Tools:

Select Stick or Unstick to stick or unstick the help and tools panel. Selecting "Stick" will keep the panel in view while scrolling the calculator vertically. If you find that annoying, select "Unstick" to keep the panel in a stationary position.

If the tools panel becomes "Unstuck" on its own, try clicking "Unstick" and then "Stick" to re-stick the panel.