💵 Down Payment Calculator

Down Payment Calculator - Everything First-Time Home Buyers Need to Know

The down payment is usually the biggest single financial hurdle in the home-buying process - but many first-time buyers don't fully understand how different down payment sizes affect their monthly costs, total interest, and PMI obligations. This calculator makes every tradeoff visible: you can see exactly what each option costs on a monthly and lifetime basis before you decide how much to put down.

Down Payment Requirements by Loan Type

The required minimum down payment varies significantly by loan program. Understanding your options changes what's possible:

PMI - What It Costs, When It Ends, and How to Avoid It

Private Mortgage Insurance (PMI) is one of the most misunderstood costs in homeownership. It protects the lender - not you - in case you default, but you pay for it. The cost is typically 0.5% to 1.5% of the loan amount per year, most commonly around 0.75–1% for borrowers with good credit.

PMI rules under the Homeowners Protection Act (1998):

• Automatic cancellation: The lender must cancel PMI when your loan balance reaches 78% of the original purchase price - based on your original amortisation schedule, regardless of actual home value changes
• Requested cancellation: You can request cancellation when your balance reaches 80% LTV, with a good payment history and no second liens
• Midpoint cancellation: PMI must be cancelled at the midpoint of your loan term even if 78% LTV hasn't been reached
• FHA MIP: Different rules - if you put down less than 10%, MIP stays for the life of the loan (requires refinancing to a conventional loan to remove it)

To eliminate PMI on a conventional loan immediately: put 20% or more down. To remove it sooner after purchase: make extra principal payments to accelerate reaching 80% LTV, then formally request cancellation.

The 20% Down Dilemma - Is Waiting Really Worth It?

The conventional wisdom to "save 20% before buying" made much more sense when home price appreciation was modest and savings rates were competitive. In markets with strong appreciation, waiting to save 20% can mean the target price keeps moving upward faster than you can save.

Consider both sides of this decision honestly:

• Case for 20%: Eliminates PMI, reduces monthly payment by $100–$300+, often qualifies for slightly better rate, provides immediate equity cushion against value fluctuations, lower total interest over loan life
• Case for less: Get into a home sooner (important in appreciating markets), preserve cash reserves for repairs and emergencies (experts recommend 1–3% of home value in liquid reserves), opportunity cost - the extra savings invested may outperform the PMI cost
• The actual math: On a $450,000 home, the PMI cost of ~$24,000 over 7.5 years at 5% down must be weighed against: (1) potential home value appreciation on your equity during those 45 months you'd be waiting to save, and (2) what $67,500 invested at 7% annual return for 10 years would become (~$132,000)

Neither answer is universally correct. The Scenarios tab shows the exact monthly and total costs at each down payment level - use those numbers alongside your local market conditions to make the right decision for your situation.

Building Your Down Payment Savings Plan

The best accounts for parking down payment savings combine safety (no investment risk on money you need within a few years) with competitive yield. As of 2025-26, high-yield savings accounts (HYSAs) and CDs are offering 4–5% APY - meaningfully better than traditional bank savings. Consider:

• High-yield savings accounts: FDIC-insured, liquid, competitive rates. Best for near-term goals (1–3 years). No lock-in period.
• Money market accounts: Similar to HYSAs, often with slightly higher yields for larger balances. Some check-writing privileges.
• Treasury bills (T-bills): Government-backed, very safe, 4–5% yield. 4, 13, 26, or 52-week terms. Slightly less liquid than a savings account but yields are competitive and federally tax-advantaged (no state income tax on interest).
• Short-term CDs: Lock in a rate for 6–18 months. Good if you have a fixed timeline. Penalty for early withdrawal.
• Avoid: Investing down payment savings in stocks or equity funds. The risk of a 20-30% drawdown right before your planned purchase date is not worth the potential extra gain.