After-Housing Income: The Only Salary Number That Matters When You Relocate

The number nobody quotes you

When a recruiter pitches an international role they will quote the gross. Your offer letter will quote the gross. Your tax return will eventually surface the net. But the number that actually determines your daily life — whether you eat out twice a week or twice a month, whether you save 20% or 2%, whether the move makes you happier or quietly miserable — is after-housing income.

After-housing income is exactly what it sounds like: net monthly income minus rent or mortgage payment on a property you'd actually want to live in. It's the single most underused metric in expat decision-making, and it explains almost every "I moved for the money and regretted it" story you've ever heard.

Why it dominates everything else

Three reasons after-housing income is uniquely useful:

1. Housing is the largest single line item for most workers. In most global cities, rent on a comparable apartment ranges from 25% to 50% of net pay. No other expense category swings that much between cities.
2. Housing cost is highly local and effectively non-negotiable. You cannot meaningfully arbitrage rent the way you can groceries or transport. You either live in the city or you don't.
3. Housing cost is structurally underestimated. Salary calculators almost always price in tax. Almost none price in median rent for a real apartment in a real neighbourhood.

Strip out housing and you have a defensible apples-to-apples comparison across cities, currencies and family situations.

The calculation, step by step

1. Start with gross salary in the destination currency.
2. Subtract effective tax + social charges at your bracket. Use OECD Taxing Wages data, your country's tax calculator, or your accountant's effective-rate estimate. Don't use marginal rate — it overstates the take.
3. Convert to monthly. Divide by 12.
4. Subtract median rent on the apartment you'd actually want, in the neighbourhood you'd actually live. Don't use the cheapest listing on Numbeo. Pull current median asking prices from a local portal. Floor space, room count and neighbourhood matter.
5. Result: monthly after-housing income.

That's it. No exotic adjustments, no purchasing-power conversions, no esoteric indices. Just the cash that hits your account each month, minus the largest fixed obligation against it.

Worked example: London versus Dubai

Imagine you have two offers:

• London: £95,000 gross, 1-bed central flat in Zone 1 at £2,400/month median.
• Dubai: AED 480,000 gross (~£103,000), 1-bed in Dubai Marina at AED 9,000/month (~£1,950).

Run the numbers:

London. Effective tax + NI on £95,000 ≈ 30.5%. Net £66,000/year, £5,500/month. Less £2,400 rent. After-housing: £3,100/month.

Dubai. No income tax. Net £103,000/year, £8,580/month. Less £1,950 rent. After-housing: £6,630/month.

After-housing income in Dubai is more than double London's. That is the answer, and no purchasing-power adjustment will undo it. Even if you spend an additional £500/month in Dubai on a car (mandatory, public transport limited) and £300/month on private health insurance, your after-after-housing residual is still nearly £6,000 versus £3,100 in London — a structural difference that will compound into materially different lives over five years.

This is not a recommendation to move to Dubai. Quality of life, climate, social fit, career trajectory and dozens of other factors matter. It is a recommendation to see the after-housing number clearly before any of those qualitative factors weigh in.

Why the inverse worked example matters too

Consider the reverse case: a US engineer offered a London move. The salary numbers, in pounds, look smaller than the US figures. The recruiter swears the cost of living offsets it. Run after-housing income honestly: at typical engineering salaries the after-housing residual in London is roughly 35–45% lower than in mid-tier US tech hubs. The recruiter is partially right (groceries and transport are cheaper, healthcare is dramatically cheaper) — but partially wrong in a way that matters, because housing dominates the math and London housing dominates London budgets.

The point of after-housing income is not that one city is "better" than another. The point is that it produces an honest baseline before the qualitative debate begins.

A trap to avoid: "but I'd downsize"

When the after-housing residual in a city is unattractive, the temptation is to plug in a cheaper apartment than the one you'd want. Resist. The whole purpose of the metric is to compare like with like: the lifestyle you'd want, not the lifestyle you'd settle for to make the spreadsheet look good. If you'd take a smaller flat in City A, ask yourself whether you'd accept that same smaller flat in City B before adjusting the math.

A reasonable adjustment is to apply a consistent housing standard across both candidates: "modern 1-bed, 35–50 m², within a 30-minute commute of the office, in a neighbourhood I'd want to walk home through at 11pm." Apply that filter to both cities and use the median listing price under that filter. That keeps the comparison honest.

How after-housing income changes career advice

A few non-obvious implications:

• Junior roles in expensive cities are usually a worse deal than they look. A 22-year-old earning £40k in London after housing keeps ~£900/month. A 22-year-old earning £30k in Manchester after housing keeps ~£1,400/month. The headline says London wins; after-housing says it loses.
• Senior roles in expensive cities are usually a better deal than they look. Housing cost is roughly fixed once you've chosen a neighbourhood; salaries scale with seniority. The after-housing residual for a senior IC in San Francisco scales much faster than in a mid-tier hub.
• Remote work bends the curve sharply. Earning a San Francisco salary while paying Lisbon rent produces an after-housing residual that no traditional location can match. This is the single largest financial argument for remote work that critics underweight.

What about owning rather than renting?

For homeowners, replace "rent" with the equivalent monthly cost of ownership: mortgage + property tax + insurance + maintenance allowance (rule of thumb: 1% of property value per year for maintenance). Don't include the principal portion of the mortgage payment as a "cost" — it's forced savings. Use only the interest portion plus the other line items.

The principle is identical: strip out the housing line, and the after-housing residual is the figure you live on.

FAQ

Should I also strip out transport? You can, and for some cities it materially changes the picture (Los Angeles, Houston, much of the Gulf). Call it "after-housing-after-transport" if you go that route. The four-line audit in our companion piece walks through this.

What if my offer includes a housing allowance? Add the allowance to net pay before subtracting rent. The metric still works; the allowance simply reduces the effective housing burden.

Does this work for cities outside developed markets? Yes, with one caveat: in some emerging markets, healthcare and education out-of-pocket costs are large enough to deserve their own line. Add an "after-housing-after-healthcare" variant if those items will be material to your family.

How do I get reliable median rent data? Local rental portals (Idealista, Rightmove, Funda, Immobilienscout, 99co, MagicBricks, Zillow) publish median asking prices by neighbourhood. Use those for any city you're seriously considering. For shortlisting cities, Numbeo's rent index is a reasonable cross-check, but verify before signing.

Does after-housing income work for couples or families? Yes — sum both partners' net incomes, subtract one rent line, and the residual is the household after-housing figure. For families with children, layer in childcare or school costs as a separate post-housing deduction if they will be substantial.