EPI / RON Wealth Indicator

Overview

How to use this calculator

1. Enter your current age in years.
2. Enter your household’s annual income; use a representative figure for your current earning level.
3. Enter your net worth, defined as total assets minus total debts (including home equity, investments, and liabilities).
4. We compute EPI and RON expected wealth benchmarks based on your age and income.
5. We divide your actual net worth by each benchmark to produce EPI and RON wealth scores.
6. Review the scores to see whether you are accumulating wealth faster or slower than these simple reference lines.

Inputs explained

Age

Your current age in years. Age is used in these formulas to scale expected wealth upward as your working years accumulate.

Household income

Your annual household income before taxes. If income fluctuates, use a recent multi‑year average to avoid overreacting to a single unusually high or low year.

Net worth

Your household’s total assets minus total debts, including home equity, retirement accounts, taxable investments, cash, and vehicles on the asset side, and mortgages, student loans, credit cards, and other debts on the liability side.

Outputs explained

EPI expected wealth

The wealth level suggested by the EPI benchmark (age × income ÷ 10). This is a more forgiving standard that many households use as a first target.

RON expected wealth

The wealth level suggested by the stricter RON benchmark (age × income ÷ 5). It represents a more aggressive accumulation standard.

EPI wealth score

Your actual net worth divided by the EPI benchmark. A score above 1.0 suggests you are ahead of that benchmark; below 1.0 suggests you are behind.

RON wealth score

Your actual net worth divided by the RON benchmark. Because RON is stricter, many households will have scores below 1.0 here even if they are doing reasonably well.

When to use it

• Benchmarking your net worth against age and income using familiar Millionaire Next Door–style formulas.
• Checking whether your wealth accumulation rate is on track, lagging, or exceeding expectations given your earnings.
• Illustrating how lifestyle choices, savings habits, and debt affect long‑term wealth relative to income peers.
• Comparing different what‑if scenarios—such as earning more, saving more, or reducing debts—to see how scores change.
• Setting a baseline metric you can revisit annually to track progress as income and net worth evolve.
• Comparing different household structures (single vs. dual‑income) using a consistent benchmark approach.
• Evaluating the potential impact of large financial decisions—like buying a home, paying off student loans, or starting a business—on your wealth trajectory.
• Providing a conversation starter for a spouse or partner when aligning on savings goals and lifestyle trade‑offs.
• Sanity‑checking whether aggressive income growth is translating into net worth growth or being absorbed by lifestyle inflation.

Tips & cautions

• EPI is more forgiving; RON is stricter. Many people will be closer to or above 1.0 on EPI and below 1.0 on RON—that’s normal.
• Use a realistic, possibly conservative income figure that reflects your typical earning power rather than a one‑time spike.
• Recalculate periodically as your age, income, and net worth change to see whether you’re closing gaps or widening leads over time.
• Treat these metrics as conversation starters, not final judgments; they ignore important factors like region, family size, and career stage.
• If income fluctuates, consider using a 3‑year average to smooth out bonuses or variable earnings.
• Be consistent about what you include in net worth—home equity, vehicles, and business equity can meaningfully change the score depending on your accounting choices.
• If you expect a near‑term income change (promotion, career switch, retirement), model both the current and expected future income to see how the benchmarks shift.
• Use these scores alongside a savings‑rate calculator or retirement projection so you aren’t relying on a single heuristic.
• Simplified formulas; they do not adjust for cost of living, household size, career breaks, or the mix and riskiness of your assets and debts.
• Based on rules of thumb from popular finance literature, not on formal financial planning or official wealth standards.
• Young high earners and older low earners can look skewed under these formulas because they do not consider time in career or retirement phase explicitly.
• Not a replacement for a comprehensive financial plan that considers goals, risk tolerance, and detailed cash flows.
• Uses current‑dollar income and net worth without inflation adjustments or time‑value‑of‑money modeling.
• Does not distinguish between liquid and illiquid assets; a high net worth may still be cash‑constrained.
• Does not incorporate taxes, employer retirement contributions, or expected future pension/social security benefits.

Worked examples

Deep dive

Methodology & assumptions

• Inputs are converted to non‑negative numbers, and age is floored at 18 to avoid unrealistic child benchmarks.
• EPI expected wealth is calculated as (Age × Income) ÷ 10.
• RON expected wealth is calculated as (Age × Income) ÷ 5.
• EPI wealth score equals Net worth ÷ EPI expected wealth; RON wealth score equals Net worth ÷ RON expected wealth.
• If expected wealth is zero (for example, zero income), the corresponding score is set to 0 to avoid division errors.
• The calculator does not apply inflation or tax adjustments; results reflect the inputs as provided.
• Output values are formatted for readability while calculations retain full precision internally.

Sources

• The Millionaire Next Door — Thomas J. Stanley & William D. DankoPopularized age‑and‑income wealth benchmarks that inspire the EPI/RON rules of thumb.
• Investor.gov — Net Worth CalculatorDefines net worth as assets minus liabilities, which this calculator uses for the input.

FAQs

Where do these formulas come from?

They are inspired by wealth benchmarks popularized in Thomas J. Stanley’s research (for example, age × income ÷ 10) and adapted here into EPI and RON indicators. They are rules of thumb, not official standards.

What does a score above or below 1.0 really mean?

A score above 1.0 means your net worth exceeds that benchmark’s expected wealth; below 1.0 means you fall short of it. However, the formulas are simplified and do not account for region, family size, or personal goals, so interpretation should be cautious.

How should I use this in my planning?

Treat it as one lens among many. If you are far below both benchmarks, you might explore ways to increase savings or reduce debt. If you are comfortably above them, it may confirm that your saving habits are strong, but a full plan should still address risk, taxes, and retirement income needs.

Should I include home equity in net worth?

Most net‑worth definitions include home equity, but it can be illiquid and sensitive to local housing prices. Include it if you want a complete balance‑sheet view, but be consistent and consider also tracking a “liquid net worth” version separately.

Should I use gross or after‑tax income?

These formulas are typically framed with gross household income. If you use after‑tax income instead, your expected wealth benchmarks will be lower, so be consistent when comparing results over time.

What if I’m retired or near retirement?

The benchmarks are designed around working‑age income. Once you retire, your income may drop while net worth remains high, which can inflate scores. At that stage, retirement income planning tools may be more relevant.

Can I use this for business owners or equity compensation?

Yes, but be careful. Illiquid business equity or unvested stock can swing net worth dramatically. You may want to run multiple scenarios (conservative and optimistic) to understand the range of outcomes.

How can I improve my score?

Improving the score generally means increasing net worth faster than income grows—by saving more, reducing high‑interest debt, investing consistently, or preventing lifestyle inflation as income rises.

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