Mortgage Calculator with Money Down

Reviewed by David Chen, CFA | Residential Mortgage Expert | Last Updated: November 2023

Planning your budget? Use this mortgage calculator with money down to see how different down payment amounts affect your monthly P&I (Principal and Interest) and overall loan balance.

Mortgage Calculator with Money Down

$
Please enter a valid home price.
$
Money down cannot exceed home price.
%
Please enter a valid interest rate.
Years
Please enter a valid term (1-50 years).
Estimated Monthly Payment
$0.00
*Principal & Interest Only

Mortgage Calculator with Money Down Formula

The core calculation determines the loan principal by subtracting your “Money Down” from the home price, then applying the standard amortization formula:

P = Home Price – Money Down
M = P [ i(1 + i)^n ] / [ (1 + i)^n – 1 ]

Variables

  • M: Monthly Principal & Interest Payment.
  • P: Principal Loan Amount (Net amount borrowed).
  • Money Down: The upfront cash payment you make.
  • i: Monthly Interest Rate (Annual Rate / 12).
  • n: Total Number of Months (Years × 12).

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What is Mortgage Calculator with Money Down?

A mortgage calculator with money down is an essential tool for homebuyers trying to determine their purchasing power. The amount of “money down” (or down payment) you provide significantly impacts your monthly payment, interest rate, and whether you will need to pay Private Mortgage Insurance (PMI).

By adjusting the money down input, you can instantly see how saving a bit more for a down payment can lower your monthly obligation and save thousands in interest over the life of the loan.

How to Calculate Mortgage with Money Down (Example)

Let’s look at a typical home buying scenario:

  1. Home Price: You want to buy a house for $400,000.
  2. Money Down: You have saved $80,000 (20% down payment).
  3. Loan Amount (P): $400,000 – $80,000 = $320,000.
  4. Rate (r): The interest rate is 6.0%.
  5. Term (t): You choose a 30-year fixed term.
  6. Monthly Rate (i): 0.06 / 12 = 0.005.
  7. Result: The principal and interest payment is approximately $1,918.56 per month.

Frequently Asked Questions (FAQ)

How much money down is required?

Standard requirements vary: Conventional loans typically require 3% to 20%, FHA loans require 3.5%, and VA or USDA loans may allow for 0% money down for eligible borrowers.

Does more money down lower my rate?

Yes, typically. Putting more money down lowers the Loan-to-Value (LTV) ratio, which reduces risk for the lender. This often results in a more favorable interest rate offer.

What if I put less than 20% down?

If your money down is less than 20% on a conventional loan, you will likely have to pay Private Mortgage Insurance (PMI). This is an extra monthly cost that protects the lender if you default.

Does this calculator include taxes?

This specific calculator focuses on Principal and Interest based on your money down. Property taxes and homeowners insurance vary widely by location and are usually added on top of this figure.

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