Income Parity Calculator

Two incomes can look close and still be far apart, and the same salary can be generous in one city and tight in another. This calculator answers both versions of the parity question: Income ratio mode divides one income by another (after annualizing monthly and hourly pay) and reports the ratio, the parity percentage and the dollar gap, while Relocation parity mode scales your salary by two cost-of-living indexes to find the pay that keeps your purchasing power after a move, plus the raise that would take.

Quick Answer

How to use the income parity calculator

Choose the mode that matches your question, fill in that pane, and click Calculate. The result stays hidden until you click, and switching modes hides the previous result so a stale answer never sits under the wrong pane.

1. Comparing two incomes: stay on Income ratio. Enter each income and set its own period selector. Pressing Enter in the second income box also runs the calculation.
2. Judging a move or a remote-work relocation offer: switch to Relocation parity. Enter your current annual income, your current city’s index, and the target city’s index, both from the same published source.
3. Read all three outputs. The ratio (or parity salary) is the headline, but the parity percentage and the annualized dollar gap are what make the comparison usable in a negotiation or a household budget.
4. Mind the basis. Compare gross with gross or take-home with take-home. The tool divides the figures you enter; it does not convert between the two, and the annual income to hourly calculator is the better stop when you need the period conversion spelled out on its own.

The two parity formulas

Ratio mode annualizes both incomes and divides the first by the second. Relocation mode scales one income by the ratio of two cost-of-living indexes.

The relocation formula is the same index-ratio arithmetic used to restate any amount between two price levels: the official BLS CPI inflation calculator multiplies an amount by the ratio of two CPI values to move it between years, and this mode multiplies a salary by the ratio of two city indexes to move it between places. The OECD’s purchasing power parity work rests on the identical idea at country scale: a ratio of price levels that equalizes what money buys in two places.

Worked examples: both modes, checked against the tool

Four verified runs cover the cases people actually bring to this page: a straight salary comparison, a mixed-period comparison, a move to a pricier city, and a move to a cheaper one.

The mixed-period row is the one most comparison tools get wrong or refuse to run: $2,500 a month annualizes to $30,000, $15 an hour annualizes to $31,200 at 2,080 hours, and only then does the division mean anything, giving 0.9615. On the pre-filled ratio run, the two annualized incomes look like this:

One warning the relocation example makes concrete: accepting the same $72,000 in the index-130 city would buy about 23% less than your current life, because 72,000 divided by 93,600 is 0.769. The headline salary did not change; its purchasing power did. That is the same trap, across places instead of years, that the income erosion calculator measures across time.

Reading a parity ratio: what the bands mean in practice

The ratio’s scale is symmetric around 1.00, and the badge inside the calculator grades every ratio result on these bands.

In a pay fairness conversation, treat the ratio as a screening number. The U.S. Equal Employment Opportunity Commission’s equal pay guidance is clear that the legal question is equal pay for substantially equal work, judged on job content, skill, effort and responsibility, not on titles. A ratio of 0.80 between two people in genuinely equal jobs is a fact worth raising; the same ratio between different roles, shifts or locations may have lawful explanations, including the geographic cost differences the relocation mode exists to price. Run the comparison both ways before you draw a conclusion: swapping which income is “first” inverts the ratio (0.8000 becomes 1.2500), and quoting the smaller number as if it were the gap understates it.

Where cost-of-living indexes come from, and how far to trust them

An index compresses thousands of prices into one number per city, with the average city set to 100. The method behind the number decides how much weight your relocation result deserves.

The C2ER Cost of Living Index FAQ explains the design: prices are collected quarterly in each participating area for a professional and managerial household standard of living, and the composite blends housing, utilities, groceries, transportation, health care and miscellaneous goods and services. Its second-quarter 2026 release puts the spread in perspective: Manhattan ran at more than twice the national average while the cheapest participating area sat more than 20% below it, and C2ER itself warns that small index differences should not be read as measurable differences. Crowd-sourced indexes such as Numbeo cover far more cities worldwide but rest on volunteer submissions of uneven size. Either source can feed this tool, because you supply both numbers; what breaks the math is mixing them, since each publisher’s basket and weights differ. For a full city-by-city price breakdown before you negotiate, the cost of living calculator compares the two places category by category.

What parity does not capture: taxes, benefits, hours and index drift

The formulas are exact, and deliberately narrow. Four gaps matter most when a real offer is on the table.

• Taxes. Two states can tax the same salary very differently, and no composite index fixes that. For an after-tax view of the same move, the equivalent income calculator runs a dedicated after-tax mode alongside its city mode.
• The 2,080-hour assumption. Hourly pay is annualized at 40 hours for 52 weeks, with no allowance for unpaid time off, overtime or a 37.5-hour week. If your real schedule differs, annualize by hand and enter the result as a yearly figure.
• Household fit. Indexes describe an average household. The BLS Real Earnings summary makes the related point for inflation: an average can move one way while your own costs move another.
• Raises after the move. Parity is a snapshot. If the new employer’s typical raise trails the raise you would have had, next year’s parity drifts; pairing the result with a cost of living raise calculation for the following year keeps the comparison honest.

What competing calculators miss

Most tools for this keyword do half the job, and a few do their half with decoration the math never uses:

• Savvy Calculator’s income parity calculator: relocation only, and done cleanly, with the parity salary and the difference both shown. Its worked example, though, introduces a 22% marginal tax rate as an input and then never uses it in any step, which teaches readers that taxes were handled when they were not. It also cannot compare two salaries at all.
• Brave Calculator’s income parity calculator: ratio only, with a long FAQ list. There are no period selectors, so its own advice is that both incomes must already share a time frame: the user does the annualizing by hand, the result is the ratio on its own with no annualized dollar gap attached, and there is no relocation mode.
• NerdWallet’s cost of living calculator: the strongest city database of the set, with item-level prices for housing, food, transport and health care in U.S. metros. It answers from its own city list only: no custom indexes, no non-U.S. cities, no salary-versus-salary ratio, and no way to test an index pair you already have.
• Popadex’s disposable income calculator: goes furthest on paper, layering tax, social security and PPP adjustment across 30-plus countries. That breadth serves expatriate tax planning, not a quick parity check between two offers, and none of it helps when your question is a domestic move between two indexed cities.
• The gap this page fills: both parity jobs in one tool, mixed pay periods normalized before dividing, the ratio shipped with its percentage and dollar gap together, any index pair from any source accepted, and the tax and hours limits stated where the result appears instead of implied away.

Frequently asked questions

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