Paying off early

[srprice12]

If I was to pay $20 extra each month on a 30 year mortgage how much quicker would I pay it off?

[NCperson]

it depends on the current mortgage balance, the interest rate and the remaining term.

there are plenty of website with mortgage calculators where you can determine the answer to your question  

[MortgageHustler88]

Say you were to have a $150,000, 30 year Mortgage at 4.5% interest starting first payment on 4/1/2019 and you make $20 extra principal payment each month, you’ll only cut it down by 18 months, or 5% savings, but if you put down $100 extra you’ll cut off almost 7 years of your loan and save almost $30,000 in interest over the period.

[Bees]

Here is an example of a calculator that adds in extra principal payments. https://www.mortgagecalculator.org/calculators/what-if-i-pay-more-calculator.php  Paying extra in the first few years can really make a difference in the length of loan.