Before you buy the house, see the bills hiding behind it.
Roof. HVAC. Water heater. Windows.
Turn the home's condition into a 5-year capital plan — then compare it with another house.
What's My Next Big Bill?
Enter the age of the Roof, HVAC, and Water Heater. See upcoming capital expenditure windows before making an offer.
Roof Covering System
Guideline lifespan: 18–28 yrs (22y median)
InterNACHI standard inspection comment classifications.
HVAC / Heating & Cooling System
Guideline lifespan: 14–22 yrs (17y median)
InterNACHI standard inspection comment classifications.
Water Heating System
Guideline lifespan: 7–12 yrs (10y median)
InterNACHI standard inspection comment classifications.
Planning Window: 2026–2028
Early-scenario exposure: $0
Window planning range: $13k–$30k
Range: $365–$800/month
Roof Covering System is the earliest modeled replacement window
From the ages and condition entered, roof covering system is the first system to review (2026–2028), with an owner-cost planning range of $12,000–$27,000. These are planning scenarios based on service-life and cost ranges, not a diagnosis, a failure date, or a probability that a particular system will fail.
What to verify next
Compare the entered age with inspection notes, permits, service records, or a contractor's written estimate. For a condo or townhome, confirm which components the association maintains and check any approved assessment documents.
Review Roof Covering System planning detailsKnow what the estimate covers
The 5-year base plan counts modeled replacement exposure within the selected horizon. It does not include every repair, operating cost, market-value factor, or work outside the selected assumptions.
See the assumptions and limitsVerified regional escrow credits, home inspection tools, and contractor warranty programs.
Modeled Capital Replacement Schedule
Capital outlays organized strictly into chronological planning windows.
Which house carries the bigger 5-year cash burden?
A cheaper house can have expensive years ahead. Compare this house against a second property to discover the Condition-Equalized Price Range.
“The cheaper house isn't always the cheaper five years.”
Most buyers compare listing prices: $440,000 vs $465,000. NextBigBill models the 5-year replacement exposure associated with each home's entered system ages and conditions.
Home A would need to sell for $429k ($11k discount) to match Home B's modeled purchase + maintenance reality.
Built for Financial Realism
We don't give you arbitrary 100-point home health scores or impossible exact failure days. We give you decision-grade financial windows.
Next Big Bill Window
Instead of guessing an exact day, we calculate the earliest likely major system replacement planning window (e.g. 2027–2029) and its range-based budget impact.
5-Year Capital Exposure
Aggregates all imminent mechanical and structural replacement costs across Due Now, 0–2 Years, and 3–5 Years into a transparent low-typical-high planning range.
Condition-Equalized Price
Mathematically solves for the exact purchase price that equalizes two homes' combined purchase price + 5-year system capital expenditure burden.
System Lifespan & Negotiation Guides
Buying a House with an Old Roof: What “Near End of Life” Actually Means
How insurance underwriters view 18+ year shingles and how to structure repair escrow credits.
Aging HVAC in the Inspection Report: Repair Credit vs Price Reduction
Why asking for a price reduction can leave you cash-poor when the compressor fails.
Home Maintenance Reserve: How Much Cash to Keep in Escrow After Closing
The 1% rule vs system age modeling. Calculate exactly how many dollars to set aside monthly.