Mortgage

How Do I Calculate My Mortgage Payment?

When you obtain a mortgage, your monthly payments will be fixed (if you have a fixed rate mortgage: read on to learn more). It might be challenging to calculate this, so we recommend utilizing a mortgage calculator to get an idea. Try this one from moneysavingexpert if you’re just looking to figure out your payments; we believe it’s great. Continue reading to find out how to calculate your own mortgage payments.

Methods for Manually Calculating Your Monthly Mortgage Payment

It is advantageous to perform a manual mortgage calculation since you will get knowledge of how various elements interact to effect your monthly rate. These elements include the total amount you borrow from a bank, the loan’s interest rate, and how long you have to pay off your mortgage.
The following equation should be used for your mortgage calculator:
M is defined as P [i(1 + i)n] / [(1 + i)n – 1].
The breakdown of each of the variables is as follows:

  • M = Total amount paid each month
  • P is equal to the whole loan amount.
  • I is your monthly percentage interest rate.
  • N is the total number of months in your mortgage repayment schedule.

For the sake of simplicity, assume that your loan totals $80,000 (P) and that your total interest rate is 5%, or.05 (i). You must divide 5% by 12 because it is your yearly interest rate. Your interest rate is.05/12 per month, or.00417.
You have 120 months, or ten years, to pay off your loan, according to the bank (n). Your equation will be M = 80,000 [.00417(1+.00417)120]/[(1+.00417)120-1] using these numbers.
Calculate (1+.00417)120 before attempting to solve. You’ll need a calculator for this part unless you can mentally compute exponents. We arrived at 1.64767. Reentering the formula, M = 80,000 [.00417(1.64767)]/[.64767].
Then, complete the math in each bracket. Due to this, the formula is reduced to 80,000 X.0106, which equals 848.
Now that you know, you may budget $848 a month for the next ten years to pay off your mortgage in full. Please note that this value is approximate because we rounded all numbers to five places after the decimal point.
The only variables we used in the calculation are the loan amount, interest rate, and time frame. A down payment, homeowner’s insurance, and property taxes are additional factors that you might need to take into account when calculating your total monthly payment.

What about fluctuating prices?

So far, we’ve been discussing fixed rates, in which the interest rate doesn’t change. Your interest rate in a variable rate mortgage is subject to change, frequently at the whim of the bank. This variable rate is typically set at the bank rate of the Bank of England plus two to three percent. The lender has complete control over your interest rate when you have a standard variable rate.


Variable rates are positively evil, if you thought compound interest was tricky. The “cost for comparison” that the majority of banks only provide is an educated guess as to what your average interest rate will be if you continue with that mortgage. These are the best educated guesses we can make; if you discover a more accurate method, give us a call. (It is very challenging.)
This is significant because the majority of mortgages only have fixed rates for a short time—typically 2 to 5 years. You’ll be paying a variable rate once your mortgage exits this introductory period, and your monthly payments could change!

Using calculators for mortgages online

There are many free payment calculators available online if you don’t want to manually calculate your mortgage payments. These operate by requesting a set number of variables and immediately giving you a fixed monthly price. Since you don’t have to do any math by hand, they are typically simple to use and very convenient.
Remember that the value of an online mortgage calculator depends on the information you enter. If you make a mistake with the numbers you supply, it might be difficult to catch an incorrect output because you won’t be able to go back and double-check the math.
Additionally, it might be challenging to locate a customizable mortgage calculator that employs all the variables you’d like to use. The mortgage calculator might not account for a special situation you have.


Most mortgage calculators don’t factor in certain costs, like your monthly utilities and home maintenance costs like pest control and security. Property taxes, homeowner’s insurance, and an HOA fee may also be recurring monthly expenses. Although each of these monthly expenses is independent of your mortgage, you should still take them into account well in advance so that you are aware of the full extent of your budget.
You should think about these extra factors and which approach will give you the best understanding of your monthly expenses before deciding whether to calculate manually or use an online mortgage calculator. When calculating your mortgage online, it might be most beneficial to include some.

Questions and Answers

How is a mortgage payment determined?

You can use the following equation to determine your monthly mortgage payment:

M is equal to P[i(1 + i)n]/[(1 + i)n – 1].

Your total monthly loan payment, annual percentage rate, and remaining loan term are all considered in the formula. You receive a fixed monthly mortgage rate from it.

What is covered by the monthly mortgage payment?

A typical mortgage payment consists of repaying your loan as well as any interest the bank charged you for the loan. Adding taxes and insurance to your monthly mortgage rate is optional, but it can be done separately.

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