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Does a larger down payment make an offer stronger?
There is some element of truth to what your realtor said.  The seller takes the house off the market after the offer is accepted but the contract is contingent upon, among other things, buyer securing the financing. A lower down payment can mean a higher chance of failing that. The buyer might be going through FHA, VA or other programs that have additional restrictions. If the buyer fails to secure a financing, that's weeks and months lost to the seller. In a seller's market, this can be an important factor in how your bid is perceived by the seller. Sometimes it even helps to disclose your credit score, for the same reason. Of course for your situation you will have to assess whether this is the case. Certainly do not let your realtor push you around to do things you are not comfortable with. Edit:  A higher down payment also helps in the situation where the house appraisal does not fare well.  As @Dilip Sarwate has pointed out, the particular area you are interested in is probably a seller's market, thus giving sellers more leverage in picking bids. All else equal, if you are the seller with multiple offers coming in at similar price level, would you pick the one with 20% down or 5% down? While it is true that realtors have their own motives to push through a deal as quickly as possible, the sellers can also be in the same boat. One less mortgage payment is not trivial to many. It's a complicated issue, as every party involved have different interests. Again, do your own due diligence, be educated, and make informed decisions.