When you secure a mortgage, understanding your payments isn't enough - you also need to understand how those payments chip away at your principal balance over time. This is where mortgage amortization schedules come into play, and there's no better tool to create one than Excel, especially when you consider the flexibility of extra payments. Let's dive into building a mortgage amortization schedule Excel template with extra payments.
Before we begin, it's crucial to understand the basics. A mortgage amortization schedule is a table that shows how much of each monthly payment goes towards interest and principal, as well as the remaining principal balance after each payment. It's a powerful tool that helps you visualize your mortgage's lifespan andhow your payments gradually lower your debt.
Setting Up the Mortgage Amortization Schedule in Excel
To start, you'll need to input your mortgage's basic details: loan amount, interest rate, loan term, and monthly payment. These will be your constants. Next, you'll create formulas to calculate the interest and principal portions of each payment, as well as the remaining principal balance.
For every payment, the interest portion remains constant (based on the principal outstanding at the beginning of the period), while the principal portion declines as the loan is repaid. The formula for the principal portion of the payment is your total payment minus the interest. The new principal balance is the old principal balance minus the principal portion of the payment.
Calculating Monthly Interest and Principal Payments
Let's start with calculating the monthly interest. Assuming cells B2, B3, and B4 contain your loan amount, interest rate, and loan term respectively, use the following formula in cell C2: `=(B2*B3/12)/(1+($B3/12)^B4)`. This calculates the monthly interest rate.
Next, in cell C5, enter your total monthly payment. Then, in cell D5, use the following formula to calculate the principal payment: `=C5-C2`. This subtracts the interest from the total payment to find the principal payment.
Tracking Each Payment's Impact on Principal Balance
In cell C6, enter your loan amount. Then, in the following cells, use the following formula to calculate the remaining principal balance: `=(C6-D5)`. This subtracts the principal payment from the remaining principal to find the new balance.
Unfortunately, Excel's built-in tools don't lend themselves to creating a full amortization schedule easily. However, by using the Goal Seek tool (Data → What-If Analysis → Goal Seek), you can increment the payment number, update the total payment and principal payment, and watch your principal balance decrease over time.
Adding Extra Payments to Your Amortization Schedule
Extra payments, or 'windshield wiper' payments, are additional principal payments made during the year. They can significantly impact your amortization schedule and help you pay off your mortgage faster. To include them in your schedule:
1. Decide on the amount and frequency of your extra payments. Increase the total monthly payment by this amount.
2. In your amortization schedule, every time an extra payment is made, use the total payment formula in the usual way. The next time, however, reduce the total payment by the amount of the extra payment, and so on.
Understanding the Impact of Extra Payments
Making extra payments isn't just about paying off your mortgage faster; it also reduces the total amount of interest you pay. For example, making an extra payment of just $100 per month can cut several years off your mortgage and save you thousands in interest. This is because each extra payment reduces the principal balance faster, which in turn reduces the interest paid in subsequent months.
Moreover, extra payments provide financial flexibility. If you're ever in a bind, you can skip an extra payment without worrying about your mortgage. This flexibility can provide considerable peace of mind.
On a final note, remember that regularly updating your amortization schedule can provide immense clarity on your mortgage's progress. It's a tangible reminder of your debt's decline and a powerful motivator to keep making those payments. Regularly review your schedule - it's worth more than just a data set; it's a financial plan.