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Buying a House and Taking Part of 20% to move initial payment date forward
In the prior PMI discussions here, it's been stated that the bank is not obligated to remove PMI until the mortgage's natural amortization puts the debt at 78% LTV. So, paying in advance like this will not automatically remove the PMI.  Nor will a lump sum payment be certain to move the next payment ahead a year. If it's entered as a principal prepayment, the next month's payment is still due. In the world of coupon books, if you sent in a year's payments, you'd not benefit from the interest saved, in one year you'd owe what the amortization table tells you.  There's no free lunch when it comes to mortgages or finance in general. This is why we usually caution that one should not be cash poor the day after buying a house. Best to save 30%, put down 20%, and have a cushion after the closing.