How to Calculate Your Parent's Care Financial Runway

Your parent's care financial runway is the number of months their combined resources — savings, monthly income, and benefits — can sustain their current or projected level of care before the money runs out. Calculating it is the single most important financial exercise for any family managing a parent's care, because it replaces "we'll figure it out" with a concrete deadline that drives real decisions.

Here's the formula, what numbers go into it, and what to do when the runway is shorter than you expected.

The Financial Runway Formula

Runway (months) = Total Accessible Assets ÷ Monthly Shortfall

Where:

Monthly Shortfall = Monthly Care Costs − Monthly Income

If your parent's monthly income covers their care costs, they have an indefinite runway at that care level. Most families aren't that fortunate — the median cost of home care alone ($35/hour for a home health aide, or roughly $6,100/month at 40 hours per week) exceeds the average Social Security retirement benefit of approximately $1,900/month.

Step 1: Calculate Total Accessible Assets

Add up everything your parent could realistically liquidate or draw down:

• Savings and checking accounts
• CDs and money market accounts
• Non-retirement investment accounts (brokerage accounts, mutual funds)
• Cash value of life insurance policies (some allow accelerated death benefits or policy loans)
• Home equity (only if they plan to sell, take a reverse mortgage, or if the home is not protected under Medicaid rules)

Do not include:

• Retirement accounts with heavy early withdrawal penalties (unless your parent is past 59½)
• Assets your parent would never agree to sell
• Items with unclear or speculative value

Be conservative. The runway calculation is only useful if the numbers going in are realistic.

Step 2: Calculate Monthly Care Costs

Care costs vary dramatically by type and region. Use actual local quotes when possible — national medians are a starting point, not an answer.

Most families need to model at least two scenarios: their parent's current care level and the level they're likely to need within 12–24 months as needs typically increase.

Don't forget supplementary costs that exist regardless of care type:

• Medications not covered by insurance ($100–$500/month is common)
• Durable medical equipment (walkers, hospital beds, lift chairs)
• Transportation to medical appointments
• Home modifications (grab bars, ramp installation, bathroom modifications)
• Incontinence supplies ($200–$300/month)

Step 3: Calculate Monthly Income

Add all reliable income sources:

• Social Security retirement or survivor benefits
• Pension payments
• Annuity payments
• Rental income (if any)
• VA benefits (if eligible — Aid and Attendance can add up to $2,431/month)
• Any state or local care assistance programs

Step 4: Run the Numbers

Example: Your mother has $180,000 in savings. Her monthly Social Security is $1,600. She currently receives 20 hours per week of home care at $32/hour.

• Monthly care costs: 20 hours × $32 × 4.33 weeks = $2,771
• Add medications ($250) + supplies ($150) + transport ($100) = $3,271 total monthly
• Monthly income: $1,600
• Monthly shortfall: $3,271 − $1,600 = $1,671
• Runway: $180,000 ÷ $1,671 = 107 months (about 9 years)

Now run the escalation scenario. If she needs 40 hours per week within two years:

• Monthly care costs: 40 hours × $32 × 4.33 = $5,542 + $500 supplementary = $6,042
• Monthly shortfall: $6,042 − $1,600 = $4,442
• Remaining assets after 24 months at current rate: $180,000 − ($1,671 × 24) = $139,896
• Runway at higher level: $139,896 ÷ $4,442 = 31 months (about 2.5 years)

That means the total runway before funds run out completely is roughly 4.5 years from now — not 9. The escalation scenario is almost always the one that matters.

What to Do When the Runway Is Short

If the calculation shows your parent's money running out within 2–5 years, you have a window to act. Here are the levers, roughly ordered by timeline:

Immediate (this month):

• Apply for any benefits your parent may qualify for — VA Aid and Attendance, state home and community-based services waiver programs, Medicaid-funded home care
• Review medications for generic substitutions (generics can save 70% or more)
• Check for utility rate reductions, property tax freezes, and senior discount programs in their area

Near-term (1–6 months):

• Consult an elder law attorney about Medicaid planning if the runway suggests eventual eligibility — the 60-month look-back period means planning needs to start years before application
• If a family member is providing care, formalize a Personal Care Agreement at fair market rates (this converts a potential Medicaid penalty into a legitimate expense)
• Explore life insurance conversion options if your parent holds a policy with cash value

Longer-term (6–18 months):

• Research lower-cost care alternatives that maintain quality: adult day programs ($1,750/month) vs. full-time home care ($6,100/month) can extend the runway significantly
• Consider household consolidation if your parent is maintaining a separate home while receiving care elsewhere
• Investigate reverse mortgage options if the home is the largest asset and the parent wants to age in place

Run It Again Every Quarter

Care costs change. Health declines. Benefits get approved or denied. A financial runway calculation done once is a snapshot — done quarterly, it's a navigation system.

The Caregiver's Budget and Cost-of-Care Planner includes a pre-built financial runway calculator along with all eight funding source breakdowns and monthly expense tracking worksheets, so you can rerun these numbers without rebuilding the spreadsheet each time.

Frequently Asked Questions

What if my parent won't tell me how much money they have?

Start with what you know or can estimate. Social Security amounts can be confirmed through their my Social Security account. Bank balances may be visible if you're on the account or hold power of attorney. Even an approximate runway calculation is more useful than none — it tells you whether you're looking at years or months.

Should I include my parent's home value in the calculation?

Only if selling, renting, or using a reverse mortgage is a realistic option your parent would consider. If they intend to live there or it's occupied by a spouse, its value is functionally locked. Note that Medicaid's home equity exemption (typically $713,000 in 2025) protects the home in most states while a spouse lives there.

How do I account for inflation in care costs?

Long-term care costs have historically risen 3–5% annually. For a rough adjustment, multiply your monthly shortfall by 1.04 for each year out. A more precise approach: recalculate quarterly using actual current local rates rather than projecting from old data.

What happens when the runway actually hits zero?

When private funds are exhausted, the typical path is Medicaid — which covers nursing home care and, in many states, home and community-based services. But Medicaid applications take 45–90 days and require extensive financial documentation going back 60 months. Starting the application process 6 months before the runway ends gives you the buffer to avoid gaps in care coverage.