Down Payment Calculator
Calculate the down payment needed for a home and how long to save for it.
Down Payment Calculator
Calculate the down payment needed for a home and how long to save for it.
Savings Growth Formula
ℹ️ Assumes monthly compounding interest
Disclaimer
Results provided by this calculator are for informational and educational purposes only. They are based on the values you enter and standard formulas, and should not be considered financial, medical, legal, or professional advice. Always consult a qualified professional before making important decisions based on these results. Roughtools makes no warranties regarding the accuracy or completeness of these calculations for your specific situation.
Frequently Asked Questions
Pro Tips
Time in the market beats timing the market. Missing just the 10 best trading days over 20 years can cut your returns in half. Stay invested through downturns.
Tax-advantaged accounts (401k, Roth IRA) let your investments grow tax-free or tax-deferred — always max these before investing in taxable accounts.
The Rule of 72: divide 72 by your annual return to estimate years to double. At 7%, money doubles every ~10.3 years. At 10%, every 7.2 years.
Increase your contribution by just 1% of salary each year you get a raise. You won't notice the difference in take-home pay, but it compounds dramatically over decades.
When to Use This Calculator
See how even small monthly contributions grow dramatically over time with compound returns — motivation to start immediately.
Calculate how much to save monthly to reach a college fund target in 10–18 years at a realistic return rate.
Project your portfolio balance at retirement based on current savings rate and expected returns.
Compare the outcome of investing a windfall now versus spreading it as monthly contributions over time.
Compare outcomes at different return rates (5%, 7%, 9%) to understand the impact of investment choice on final balance.
About the Down Payment Calculator
This down payment calculator determines exactly how much you need to save for a home purchase and creates a savings timeline based on your monthly savings rate. Enter the home price, desired down payment percentage, current savings, and monthly savings amount to see when you will be ready to buy. Built for first-time homebuyers planning their path to homeownership.
How to Use the Down Payment Calculator
- 1
Enter the target home purchase price in dollars.
- 2
Enter the down payment percentage you are targeting (3.5%, 10%, or 20% are common).
- 3
Enter your current savings already set aside for the down payment.
- 4
Enter how much you can save each month toward the goal.
- 5
The calculator shows your target amount, shortfall, and months to reach your goal.
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