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 @86ee8b2c 

My mortgage charged interest daily, and I got paid weekly, so it worked out. 

If you do the math -- just run an excel spreadsheet -- you'll find your sweet spot. If you do a bi weekly payment, you can add an additional $50 to cover the interest charged in the week you don't pay, plus principal payoff 
 @dabe0ad5 

Ah, paid weekly, that makes sense.

Every day the money sits in your account and isn’t invested in either stocks, treasuries, or mortgage principal reduction, is a day of opportunity cost … at present interest rates, mortgage principal reduction is the “best” investment though it’s good to keep a cash reserve too