A house can move away while you save when the target home compounds faster than the money pointed at it. A $750,000 home growing at 6% becomes about $1.34 million in 10 years. Saving more still may not close the gap if the target keeps compounding faster, at these assumptions.
That is the Future Affordability problem in its cleanest form. The goal is not static. It has a price today, a modeled future cost, and a growth rate that may be different from your cash, investments, income, or monthly savings.
The down payment is not the whole race
Most home calculators ask a useful but narrower question: what down payment or monthly payment would a home require?
Aspire's home tracker asks a different planning question: is the home you want moving closer or farther away from the resources pointed at it?
That distinction matters because a down payment can grow in two ways at once. The target home can get more expensive, and the required down-payment dollars can rise with it. If your current resources and monthly contributions do not compound at the same pace, the finish line can move even while the account balance rises.
Example:
| Assumption | Value |
|---|---|
| Target home today | $750,000 |
| Home-cost growth | 6.0% |
| Time horizon | 10 years |
| Modeled future home cost | about $1.34 million |
| 20% down payment today | $150,000 |
| 20% down payment in 10 years | about $269,000 |
The down payment rose by about $119,000 before taxes, insurance, repairs, closing costs, or mortgage qualification entered the conversation.
Why income can feel less helpful than expected
High income helps, but it does not automatically solve a future affordability gap. The relevant comparison is not income versus today's home price. It is the growth of resources pointed at the home versus the growth of the home target.
If the target home grows at 6% and the money pointed at it grows at 3%, the gap can widen. If monthly savings rise, the gap may narrow. If the home-cost assumption rises faster than savings, the gap may widen again.
That is why Aspire keeps the assumptions visible. A single confident number would hide the part that matters most: which assumption moved.
What the Future Home Tracker adds
The Future Home Tracker keeps the scenario narrow on purpose. It asks for one home, one timeline, one home-cost growth assumption, current resources, planned monthly contributions, and a resource-growth assumption.
The output shows:
- Future Cost at these assumptions.
- Future Resources at these assumptions.
- Aspire Rate at these assumptions.
- Aspire Gap at these assumptions.
- The assumptions used to produce the result.
Save the scenario and you can reopen it from the return link, change an assumption, and compare before versus after. That is the behavior Aspire needs to validate before adding more wedges.
What this does not tell you
This explainer and the tracker do not say whether to buy, wait, borrow, sell, refinance, relocate, change investments, or target a different home. They also do not estimate taxes, insurance, HOA fees, PMI, closing costs, school districts, commute value, inventory quality, or mortgage approval.
Those are real questions. They are just not the first question Aspire is trying to answer here.
The first question is simpler: at these assumptions, did the home move closer or farther away?
Track a future home → Future Home Tracker
Methodology footnote. Future Cost is today's goal amount compounded by the selected home-cost growth assumption over the selected horizon. Aspire Gap compares the relevant resource-growth assumption with the Aspire Rate at these assumptions. Home-rate defaults and source labels come from Aspire's committed rates.json home rows, including Zillow ZHVI metro rows and Case-Shiller national home-price rows where available. See the /methodology/ page for source windows, formulas, and limitations. Outputs are educational measurements at your current assumptions, not investment, tax, legal, insurance, mortgage, or financial advice.