Why two big salaries are not the same salary
When people weigh a move between cities, they usually fixate on the headline number, and that number lies in two directions at once. The first distortion is currency: a salary quoted in dollars, pounds, or euros sounds different purely because of the exchange rate, with no change in what it buys. The second distortion is price level: rent, groceries, transport, and services cost wildly different amounts in San Francisco, Berlin, and Bangalore. A salary is only meaningful relative to what it has to cover, so the only fair way to compare two cities is to strip out both distortions and ask a single question: how much money do I need in city B to live the way I live in city A.
That is exactly what the adjuster computes. It first converts at the mid-market rate, the true rate before any bank margin, then multiplies by the ratio of the two cities' cost-of-living indices. The result is the equivalent local salary. Seeing the raw conversion and the adjusted figure side by side is often a small revelation: a London offer that looks like a pay cut against a San Francisco salary in dollar terms can be roughly level once London's lower cost of living is folded in, and a move to a cheaper city can leave you materially better off on a smaller nominal number.
What the cost-of-living index does and does not capture
The index is a blended average across the main categories of household spending, weighted roughly the way a typical resident spends. It is excellent for a first-pass comparison and poor at modelling anyone unusual. If you spend far more or far less than average on housing, the single biggest line item, your personal adjustment will diverge from the index. Someone who is happy in a small flat in an expensive city, or who insists on a house with a garden in a cheap one, will not match the average basket. Use the adjusted figure as the centre of a range, not a precise target, and sanity-check it against actual local rents for the kind of home you want.
The index also says nothing about tax, which is a separate and often larger swing between countries. A city can be cheap to live in but sit in a high-tax country, eroding the gross advantage before you ever spend it. That is why the most reliable cross-border comparison runs salaries through both this adjuster and the take-home calculator: one handles prices, the other handles tax, and only together do they tell you whether a move actually leaves you ahead.
Turning the number into a decision
If a prospective employer is relocating you and offers to convert your salary one for one, this tool is the quickest way to check whether that offer keeps you whole. Anchor the conversation on the purchasing-power equivalent, not the raw conversion, and you can frame a counter as restoring parity rather than asking for a raise. If you are choosing between two cities for a fresh job search, the adjuster tells you which market actually pays more in real terms, which is rarely the one with the biggest headline. And if you are simply curious whether you could live better somewhere else on the same skills, it gives you a defensible number to plan around. Whatever the use, the principle holds: compare what a salary buys, never what it says.
Frequently asked questions
- How does a cost-of-living salary adjustment work?
- It does two things in sequence. First it converts your salary from the source city's currency into the target city's currency at the mid-market exchange rate. Then it scales that figure by the ratio of the two cities' cost-of-living indices, so the result is the local salary that buys the same basket of housing, food, and everyday spending. If the target city is cheaper, the equivalent comes out lower than the raw conversion; if it is pricier, it comes out higher.
- What is a cost-of-living index?
- A cost-of-living index expresses how expensive a city is relative to a reference city. We use New York as the base at 100, drawing on Numbeo and Mercer 2025 data. A city at 80 is roughly 20 percent cheaper than New York overall; a city at 112 is about 12 percent pricier. Because it is a single blended number across rent, groceries, transport, and services, it is a guide to overall affordability, not a precise basket for your exact lifestyle.
- Why does the raw currency conversion differ from the adjusted figure?
- Exchange rates and price levels are two separate things. A favourable exchange rate can make a salary look large in another currency even if that city is expensive to live in. The adjuster separates the two so you can see how much of the difference is the money market and how much is genuine purchasing power. The adjusted number is the one that tells you whether you would actually be better off.
- Should I use this to negotiate a relocation salary?
- It is a strong starting point for the conversation. If a company wants to move you and offers a flat currency conversion of your current pay, this tool shows whether that keeps your standard of living whole. Pair it with the take-home calculator, because tax rates differ by country too, and a generous gross in a high-tax city can still leave you worse off net. Bring both numbers to the table.
- Is this financial advice?
- No. Cost-of-living indices are broad averages and your personal spending may look nothing like the basket they measure, especially if your housing situation is unusual. Treat the result as reference information for comparing cities, not as personalised financial, tax, or relocation advice. Verify the specifics before making a move.