You want to buy a house in a few years. The first question is how much cash to have ready, and almost everyone answers 20 percent of the price. That number is real, but it is neither a requirement nor the whole amount you need.

Where the 20 Percent Number Comes From

Twenty percent is not a law and it is not a lender rule. It is the point on a conventional loan where the lender stops requiring private mortgage insurance, a monthly charge that protects the lender if you stop paying. What PMI costs and when it ends is covered in the mortgages article. What matters here is the direction of the rule. Below 20 percent you can still buy. You just pay the insurance until you cross the line.

So the choice is not twenty percent or nothing. It is less down plus a monthly charge, or more down and no charge.

The Loan Programs That Ask for Less

Conventional loans are the standard kind, not backed by a government agency. They go well below 20 percent, and some programs for first-time or lower-income buyers reach the low single digits, with PMI until you build enough equity.

FHA loans are insured by the Federal Housing Administration and built around small down payments and weaker credit. The minimum is tied to your credit score, and their mortgage insurance works differently from PMI and often lasts longer.

VA loans go to veterans, active-duty service members, some Guard and Reserve members, and certain surviving spouses, and can require nothing down. Eligibility comes from your service record, not your income.

USDA loans cover homes the Department of Agriculture designates as rural, and also allow zero down. Income limits apply, and rural is broader than it sounds, so check the eligibility map first.

All of them charge fees that change, so the minimum down payment is one number among several.

The Cash You Actually Need at Closing

The down payment is one line on a list.

Closing costs are the next: lender fees, title work, recording, prepaid taxes and insurance, commonly 2 to 5 percent of the loan. Some of that lands early, because an appraisal and an inspection come out of pocket weeks before closing, whether or not the deal survives. Earnest money, the deposit that goes up with your offer, does come back as a credit, but it also leaves your account early.

Moving costs money, and so do the first repairs, because something is always wrong and the inspection tells you what without paying for it.

Last is a reserve, separate from everything above. Owning replaces a landlord you could call with a bill you have to pay, and closing with an empty account is how a brand new owner borrows again in month two, on a credit card, for a water heater. An emergency fund you already hold is that reserve, and it does not go toward the down payment.

A Worked Example With Round Numbers

Illustrative figures only. A $300,000 house with 5 percent down.

  • Down payment: $15,000

  • Closing costs at 3 percent of the $285,000 loan: $8,550

  • Moving: $2,000

  • First repairs and what the house needs: $3,000

  • Reserve, three months of $3,000 in essential expenses: $9,000

That is $37,550, and the down payment is 40 percent of it. Budget only the $15,000 and you are $22,550 short on a purchase you believed you could afford. Run this list with your own numbers before setting a savings goal, because the goal is the total.

Bigger Down Payment or Buying Sooner

More down means a smaller loan, a smaller payment, less interest over the life of the loan, and no PMI past 20 percent on a conventional loan. Those gains are real and calculable.

The costs are harder to see. Every extra month of saving is another month of rent instead of equity. Money inside a house is hard to get out, since the only routes are selling or borrowing against it. And while you save, prices and rates move in one direction or the other, and nobody knows which.

Neither side wins automatically. A buyer who can put 5 percent down now and still keep a full reserve is often better off than one who waits four years to reach 20 percent. A buyer with shaky income who would be stretched thin at 5 percent is not.

Where the Money Sits While You Save

The answer follows from your deadline. A down payment with a date inside the next few years does not belong in the stock market. Stocks have paid well over long stretches, but they can drop 30 percent and stay down for years, and your closing date will not move for them. You need a known amount on a known day, which is a different job from growing money.

High-yield savings, money market accounts, certificates of deposit and Treasury bills are built for that job. A CD or a Treasury bill locks in a rate, so match its maturity to your timeline. A good rate on money you cannot reach on closing day is worth nothing.

Where Down Payment Money Comes From

Most of it is ordinary saving, and an automatic transfer into a separate account on payday beats good intentions, mostly because you stop seeing the money as spendable.

Gift money is common and fully allowed, but lenders need proof it is a gift and not a quiet loan, because a loan changes what you owe each month. Expect a gift letter, signed by the giver, naming the amount, the relationship and the fact that no repayment is expected. Lenders also limit who can give it, usually a relative, and they trace the deposit through your statements. Never call a loan a gift on the paperwork, which is mortgage fraud.

Retirement accounts have a door, usually the wrong one. You may take $10,000 over your lifetime from an IRA for a first home without the 10 percent early withdrawal penalty, and first means you have not owned a main home in two years. A traditional IRA withdrawal is still taxable income. Roth contributions come out any time, and many 401(k) plans allow a loan. Leave the job and you have until that year's tax return is due, extensions included, to repay it or roll it over before it counts as a withdrawal. The reason to avoid all of it is the same: a dollar pulled out at 28 stops compounding for forty years and cannot be put back. You can save another down payment. You cannot buy back the years.

State and local help is the source people miss. Nearly every state runs a housing finance agency with first-time buyer programs, and many counties and cities add their own. The money arrives as a grant, a forgivable second loan, or a low-interest loan for the down payment. Rules vary a lot: income caps, price caps, specific neighborhoods, a required education course. Look up your state's agency by name, because these are barely advertised and one that fits can be worth a year of saving.

Lenders Look at More Than the Cash

Cash is one of four things an underwriter checks. Your credit history sets the rate you are offered and can decide approval by itself. Your debt-to-income ratio, monthly debt payments divided by gross monthly income, has to fall under the program's limit, so a car loan and student loans shrink the house you qualify for. Your income needs a track record. And the source of the down payment gets documented, which is what the gift letter is for.

So the saving is one job of several, and the others take just as long. Paying down a credit card, keeping old accounts open, and not financing a car in the six months before you apply all move the same needle. Start those the day you open the savings account, because credit and income history are the two things you cannot fix quickly at the end.