I don't have a mortgage anymore, so I don't get to play with my epic mortgage calculator to see how much interest, or time I can save by putting down a little more, or less, or one lump sums. Watching the payoff dates and all the little numbers change... Seriously, I've spent a TON of time over the years playing with that thing.

So now, whenever I hear ANY kind of story of someones new loan or rates or anything, I punch it all into the calc machine and look at it all...

Just today, convo was talking about a normal size house in the HCOL area on the west coast is like $1M. So, into the calc is goes...

1,000,000 @ 30 years @ 4%

= $4774.15/mo payment, make min payments and pay an extra $718,695.06 in interest!!!

= If round up to an even $5k/mo, it saves you $68,000 and knocks 2.5 years off the loan.

1,000,000 @ 15 years @4%

= $7,396.88/mo payment, pay saves $387,257 in interest!