Introduction

When stairs become difficult or unsafe, many households compare two practical accessibility paths: (1) stay in the current home and install a stair lift, or (2) move to a single-story home (or a home with a main-floor bedroom and bath). The challenge is that these options have different cost shapes: a stair lift is typically a larger upfront purchase plus ongoing maintenance, while moving has a large one-time transaction cost plus a potentially higher or lower monthly housing cost.

This calculator helps you compare the total cash cost over time for both choices and estimates the break-even year—the point where the cumulative cost of moving becomes equal to the cumulative cost of installing and maintaining a lift. It’s designed for quick planning and “what-if” scenarios, not as a replacement for contractor quotes or real estate advice.

How to use the calculator

  1. Enter the one-time stair lift purchase & installation cost.
  2. Enter the annual stair lift maintenance cost (service plan, repairs, inspections).
  3. Enter the one-time cost to move (agent commissions, closing costs, movers, deposits, setup fees).
  4. Enter the monthly housing cost difference for the new home:
    • Use a positive number if the new home costs more per month.
    • Use a negative number if the new home costs less per month (monthly savings).
  5. Choose years to analyze, then select Compute.

Tip: If you’re unsure about monthly difference, start with your best estimate (mortgage/rent, taxes, insurance, utilities, HOA) and then test a few alternatives (for example, ±$100/month) to see how sensitive the decision is.

What you’ll enter

  • Stair lift purchase & installation cost: one-time upfront cost.
  • Annual stair lift maintenance cost: yearly service/repairs/contract estimate.
  • One-time cost to move: commissions, closing costs, movers, etc.
  • Monthly housing cost difference: new home monthly cost minus current home monthly cost. Use a negative number if the new home is cheaper per month.
  • Years to analyze: how far out to compare totals.

Formulas used

The calculator uses a simple cash-cost model (no financing/interest):

  • Total cost (install lift) = Cl + Ml × Y
  • Total cost (move) = Cm + D × 12 × Y

Break-even occurs when both totals are equal. Solving for Y:

Y = Cm − Cl Ml − D × 12

If the denominator is zero, a break-even year can’t be determined (the annualized costs are equal). If the computed break-even year is not positive, there is no positive break-even point under the given assumptions.

Worked example (with break-even)

Assume these inputs:

  • Lift purchase & installation: $9,000
  • Lift maintenance: $250/year
  • One-time moving cost: $18,000
  • New home monthly cost difference: -$100/month (a $100 monthly savings)

Over 6 years: Lift total = 9,000 + 250×6 = $10,500. Move total = 18,000 + (-100)×12×6 = $10,800. The totals are close at year 6.

Break-even year: (18,000 − 9,000) ÷ (250 − (-100×12)) = 9,000 ÷ 1,450 ≈ 6.2 years. Interpretation: if you expect to stay in the situation longer than ~6 years, the monthly savings from moving may outweigh the higher upfront moving cost.

Assumptions & limitations

  • Maintenance and monthly differences are treated as constant over time.
  • Does not include financing costs, taxes, insurance changes, or home value/resale effects.
  • Does not model lift replacement timing, major repairs, or warranty coverage differences.
  • Non-financial factors (safety, caregiving needs, neighborhood, accessibility features beyond stairs) are not modeled.

Related tools: Moving Cost Calculator, Home Renovation Budget Calculator, Wheelchair Ramp Slope Calculator, Modular Home vs Stick-Built Cost Calculator.

Cost inputs

One-time upfront cost for equipment and installation.

Service plan, repairs, and other yearly upkeep.

Include commissions, closing costs, movers, and setup costs.

New monthly cost minus current monthly cost. Use a negative number if the new home is cheaper.

Must be greater than zero.

Update the values above to compare stair lift and moving costs.

More context: choosing between a stair lift and moving

As mobility changes with age, injury, or chronic conditions, stairs inside a house can become a daily challenge. Homeowners often face two expensive options: retrofit the existing home with a stair lift, or relocate to a one-story dwelling. Each path carries financial consequences beyond the sticker price. A stair lift requires equipment, installation, and periodic maintenance. Moving involves real estate commissions, closing costs, and potentially higher monthly housing expenses. Because these costs unfold over different timeframes, it is difficult to intuitively decide which approach is more economical.

This calculator provides a structured comparison by estimating the total cash cost of both strategies over a chosen number of years and by identifying the break-even point at which moving becomes cheaper than staying put with a lift. It can be useful for homeowners, adult children planning for a parent, or caregivers weighing long-term accessibility solutions.

Interpreting the results

The results panel shows the total cost for each option over your selected time horizon. If a break-even year is shown, it means that at approximately that year the cumulative totals match. Before that point, the option with the lower total is cheaper; after that point, the other option becomes cheaper. If the calculator reports that there is no positive break-even year, it means one option remains cheaper under the assumptions you entered.

What to include in “monthly housing cost difference”

The monthly difference is often the most influential input. Consider including items that are likely to change when you move:

  • Mortgage or rent payment
  • Property taxes (if escrowed monthly, include the monthly equivalent)
  • Homeowners insurance
  • HOA or condo fees
  • Utilities that differ materially (heating/cooling, water, trash)

If you expect the new home to be cheaper each month, enter a negative number (for example, -100 for a $100/month savings). If it will be more expensive, enter a positive number.

Assumptions and limitations (expanded)

This calculator intentionally simplifies many real-world complexities so you can get a quick comparison. It assumes the lift’s maintenance cost is constant and that its mechanical life matches the analysis period. In reality, lifts may need major repairs or replacement after a decade, which would increase long-term costs. The housing cost difference is treated as fixed, ignoring potential property tax changes, homeowner association fee increases, rent increases, or utility price changes.

The model also evaluates only financial costs, not emotional or logistical factors. Remaining in a familiar home may offer intangible benefits such as community ties and established routines. Conversely, moving might bring better accessibility features beyond the absence of stairs, like wider doorways, a step-free entry, or proximity to healthcare and family support.

Resale value effects are not included. A stair lift might need removal for resale or could affect buyer interest. A single-story home may appreciate differently than a two-story property depending on local demand. If you want a more complete picture, consider running the calculator multiple times with different assumptions and discussing the results with contractors and real estate professionals.

Planning tips

  • Run multiple scenarios: try conservative and optimistic monthly differences (for example, +$200, $0, -$200).
  • Use realistic moving costs: include commissions, closing costs, repairs to sell, and temporary housing if needed.
  • Revisit annually: maintenance contracts, housing markets, and health needs can change.
  • Prioritize safety: if stairs are an immediate hazard, the cheapest option may not be the safest option.

For related planning, you may also find these tools helpful: Wheelchair Ramp Slope Calculator, Moving Cost Calculator, Home Renovation Budget Calculator, and Modular Home vs Stick-Built Cost Calculator.