5% vs 10% vs 20% Down Payment: Which Is Best for Your Mortgage?
Compare 5%, 10%, and 20% down payments on a $400,000 home. See how your down payment affects monthly payments, mortgage interest, PMI, cash reserves, and long-term costs.
For most homebuyers, 20% down is the lowest-cost option, but it is not always the best financial decision. On a $400,000 home, a 5% down payment requires $20,000 upfront, while 10% requires $40,000 and 20% requires $80,000. A larger down payment reduces your loan balance, monthly payment, and total interest, and 20% may also eliminate PMI on many conventional loans. However, putting 20% down can leave you cash-poor after closing. Our recommendation: choose 20% down if you can still keep a 3–6 month emergency fund and cover closing and moving costs; otherwise, 10% is often a strong middle ground, while 5% makes sense when preserving cash or buying sooner is more important.
5% vs 10% vs 20% Down Payment: The Quick Answer
If your priority is minimizing the total cost of your mortgage, 20% down is usually the best choice. If your priority is balancing lower monthly payments with enough cash reserves, 10% is often the better compromise. If you need to preserve cash or qualify for a home sooner, 5% can be reasonable, but you will generally borrow more and may have to pay PMI. For a $400,000 home, the three options require $20,000, $40,000, and $80,000 in down payment respectively. Our recommendation is simple: do not put 20% down if doing so would leave you without enough emergency savings after closing.
Our recommendation
Choose 20% down when you have enough cash to cover the $80,000 down payment, closing costs, moving expenses, and at least 3–6 months of essential expenses. Choose 10% when 20% would drain too much of your savings. Choose 5% when preserving liquidity or buying sooner is more important than minimizing long-term mortgage costs.
5% vs 10% vs 20% Down Payment: Side-by-Side Comparison
Using a $400,000 home price and a 30-year fixed mortgage at 6.5% APR, the difference between down payments is substantial. With 5% down, you borrow $380,000 and the estimated principal-and-interest payment is about $2,402 per month. With 10% down, you borrow $360,000 and pay about $2,276 per month. With 20% down, you borrow $320,000 and pay about $2,023 per month. The 20% option reduces the monthly principal-and-interest payment by about $379 compared with 5% down and by about $253 compared with 10% down.
5% down: $20,000 upfront
A 5% down payment leaves the most cash available for emergencies, repairs, investments, or other financial goals. On a $400,000 home, the loan amount is approximately $380,000 and the estimated monthly principal-and-interest payment is about $2,402. The downside is that you borrow $60,000 more than with a 20% down payment, which increases interest costs. Conventional borrowers may also have to pay PMI until they build sufficient equity.
10% down: $40,000 upfront
A 10% down payment is a practical middle ground. You reduce the loan balance by another $20,000 compared with 5% down and lower the estimated monthly principal-and-interest payment by about $126. You still keep $40,000 more in cash than with a 20% down payment, although PMI may still apply depending on the loan and lender.
20% down: $80,000 upfront
A 20% down payment gives you the smallest loan balance and lowest monthly principal-and-interest payment among these three options. On the $400,000 example, the estimated payment is about $2,023 per month. With many conventional mortgages, putting at least 20% down can also eliminate the need for PMI. The main disadvantage is liquidity: you commit an additional $40,000 compared with a 10% down payment.
How Much Does Each Down Payment Cost Over 30 Years?
Ignoring taxes, insurance, HOA fees, PMI, and future refinancing, the 20% down option has the lowest lifetime mortgage interest because you borrow the least. At 6.5% APR over 30 years, the estimated total principal-and-interest payments are approximately $864,600 on a $380,000 loan, $819,400 on a $360,000 loan, and $728,300 on a $320,000 loan. That means the 20% option can save roughly $136,000 in interest compared with borrowing $380,000 at the same rate. However, this comparison assumes you keep the mortgage for the full 30 years and does not account for PMI or investment returns on the cash you keep instead of putting into the home.
The 5% down payment trade-off
The main advantage of 5% down is liquidity. You keep $60,000 more cash than with a 20% down payment. The trade-off is a larger loan balance, higher monthly payments, potentially higher PMI costs, and substantially more interest over a full 30-year term.
The 10% down payment trade-off
The 10% option reduces borrowing compared with 5% down while preserving $40,000 of cash compared with 20% down. It can be attractive for buyers who want to lower their monthly payment but do not want to commit most of their savings to the house.
The 20% down payment trade-off
The 20% option minimizes the mortgage balance and usually provides the lowest long-term borrowing cost. However, the extra $40,000 required compared with a 10% down payment has an opportunity cost. If that money could otherwise fund an emergency reserve, pay off high-interest debt, or earn a higher risk-adjusted return elsewhere, putting every available dollar into the house may not be optimal.
When Is 20% Down Better Than 10% or 5%?
20% down is generally better when you have stable income, sufficient savings, and no high-interest debt. The key benefit is not just the lower monthly payment: you also start with more home equity and may avoid PMI on a conventional mortgage. For the $400,000 example, moving from 10% to 20% down requires an additional $40,000 but reduces the estimated principal-and-interest payment by about $253 per month. That is roughly $3,036 in annual payment savings before considering PMI. Our recommendation: if you can put 20% down and still maintain a strong emergency fund, it is usually the lowest-cost option.
Choose 20% down when
Choose 20% down if you will still have 3–6 months of essential expenses after paying the down payment and closing costs, your income is stable, and you do not have higher-interest debt that should be paid first.
Do not force 20% down when
Do not force a 20% down payment if it would leave you with little or no cash after closing. Homeowners face unexpected expenses such as repairs, insurance increases, and maintenance. A slightly higher mortgage payment is often safer than becoming house-rich and cash-poor.
When Is 10% Down the Better Choice?
10% down is often the best compromise for buyers who can afford more than 5% but do not want to tie up $80,000 in a $400,000 home. Compared with 5% down, you borrow $20,000 less and reduce the estimated principal-and-interest payment by about $126 per month. Compared with 20% down, you keep an additional $40,000 in cash. The main drawback is that PMI may still apply, so you should compare the actual PMI cost with the benefit of keeping the extra cash.
A practical 10% down scenario
Suppose you have $100,000 in savings. Putting 20% down on a $400,000 home would use $80,000 before closing costs, leaving little room for emergencies. A 10% down payment uses $40,000, leaving substantially more liquidity. In this situation, 10% may be financially safer even though the mortgage is more expensive.
When Does 5% Down Make Sense?
5% down makes sense when preserving cash or buying sooner is more valuable to you than minimizing mortgage costs. It can be a reasonable choice for buyers with stable income, strong credit, and a clear plan to build equity over time. However, a 5% down payment should not be used simply to buy a more expensive house than you can comfortably afford. Our recommendation: use 5% down only when the resulting monthly payment, PMI, taxes, insurance, and other housing costs still fit comfortably within your budget and you maintain adequate emergency savings.
The biggest risk of 5% down
The biggest risk is starting homeownership with a high loan balance and limited equity. If home prices fall, selling the property can become more difficult because transaction costs may consume much of your available equity. A larger down payment provides a larger initial equity cushion.
Should You Put 20% Down or Keep the Extra Cash?
The answer depends on what the extra cash will do. If the alternative is leaving $40,000 in a low-yield savings account while carrying a 6.5% mortgage, increasing your down payment can be attractive because it reduces borrowing costs. If the alternative is paying off 20% APR credit card debt, paying the credit card first is usually the stronger financial decision. If the money is needed for an emergency fund, keeping the cash is more important than reaching 20% down. Our recommendation: prioritize emergency savings and high-interest debt before maximizing your down payment.
A simple priority order
A practical order is: maintain an emergency fund, pay off high-interest debt, cover closing and moving costs, then decide whether additional cash should go toward the down payment. Do not sacrifice financial stability just to avoid PMI or reach exactly 20% down.
5% vs 10% vs 20% Down Payment: Which Should You Choose?
For most buyers, 20% down is the best option for minimizing mortgage costs, but 10% is often the better overall choice when liquidity matters. 5% down is best reserved for buyers who need to preserve cash or who would otherwise delay buying for several years. On a $400,000 home at 6.5% APR, moving from 5% to 20% down reduces the loan balance by $60,000 and the estimated monthly principal-and-interest payment by about $379. However, the decision should not be based on monthly payment alone. Compare the down payment, PMI, closing costs, emergency reserves, and alternative uses for your cash before deciding.
Our final recommendation
Choose 20% down if you can comfortably afford it while keeping 3–6 months of emergency savings. Choose 10% down if 20% would leave you financially stretched. Choose 5% down if preserving liquidity is essential and the monthly payment remains affordable. For most first-time buyers who have enough savings for 10% but not enough for 20% without draining their reserves, 10% is a reasonable starting point to compare.
Use a Mortgage Calculator Before Choosing Your Down Payment
The right down payment depends on more than the purchase price. Compare each scenario using the same home price, APR, loan term, property taxes, insurance, and estimated PMI. Then compare the monthly payment, total interest, cash required upfront, and remaining emergency savings. A mortgage calculator can help you see the direct cost difference between 5%, 10%, and 20% down before you commit to a home purchase.
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