The calculator is correct for what is showing. It appears to be using just about a lease rate of 9 (think 9%). That is reasonable in the Hartford GMAC area for an "A" tier qualifier.

Here is what I found CoolOne 206 to explain why it seams off. Played around with it and it appears that no matter what you put for the selling price, it is still using $19,995 as the MSRP. So trying a more expensive Solstice, it uses a low residual and the payment is off.

Here is a quick way to figure a monthly payment on a lease. Especially when the buyer knows the residual percentage (find the post above) and the lease rate.

- Take your MSRP and multiply by the Residual Percentage to determine the Residual Value.
- Take your Selling Price and subtract any Capital Cost Reduction (downpayment) then subtract the Residual Value to get the Depreciation Amount.
- Add the ease Aquisiton Fee ($595 is a very common GMAC fee) to the Depreciation Amount to get a new Total Cost.
- Figure a regular loan for the Total Cost amount for the term you are using with the Lease Rate (say 9%), using an online loan calcualtor to get a Monthly Payment figure.
- Multiply the Residual Value amount by the Lease Rate and divide by 12 to get a second Monthly Paymnet amount.
- Add the two monthly payment amounts together to get your approximate lease payment.

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