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Keep more of your money available
A down payment is not money lost. It becomes home equity — the part of the home's value that belongs to you after subtracting what you still owe on the mortgage. But equity in a house does not behave like cash: getting to it usually means selling, refinancing or borrowing against the property, each with its own cost and timing.
Money a renter does not put into a purchase may stay available for an emergency fund, investments, a business opportunity, a career change, a future housing decision, or something else entirely. Whether that matters depends on how much money a household needs to be able to reach, and what it plans to do with it.
A down payment is not an expense, but it does tie up cash you could otherwise reach.
