Geographic Arbitrage: Shrink Your FIRE Number by Moving

If you've been grinding through FIRE calculations lately, you've probably stared at your target number and thought, "That's going to take forever." You're not alone. For many people chasing financial independence, the math feels discouraging, especially in expensive cities where rent, property taxes, and basic groceries seem designed to drain savings accounts.

But here's the thing: your FIRE number isn't fixed. It's directly tied to how much you spend each year. And where you live has an enormous influence on that figure. Geographic arbitrage, sometimes called geoarbitrage, is the practice of moving to a lower-cost location to reduce your annual expenses and, by extension, the total nest egg you need to retire. It's not a loophole or a trick. It's just math working in your favor for once.

This post walks through how cost-of-living differences affect your FIRE number under the widely used 25x framework, uses real-world comparison examples, and covers the honest tradeoffs, including healthcare, taxes, and what it actually feels like to leave the place you call home.

Before diving into locations, it helps to revisit the math that makes geoarbitrage so powerful. The FIRE movement's most common target-setting tool is the 25x rule: multiply your expected annual spending by 25 to arrive at your target portfolio. This figure is grounded in the 4% safe withdrawal rate, which suggests that withdrawing 4% of a diversified portfolio each year has historically had a strong chance of lasting 30 or more years. (If you want to dig deeper into how that rate holds up today, our piece on safe withdrawal rates in 2026 is worth a read.)

The key insight is that your annual spending is the multiplier. Spend less, need less. Here's a straightforward illustration using three different annual spending levels:

• $80,000/year spending: FIRE number = $2,000,000
• $60,000/year spending: FIRE number = $1,500,000
• $40,000/year spending: FIRE number = $1,000,000

That's a $1,000,000 difference between a $80K lifestyle and a $40K one. And the gap between a high-cost city and a low-cost one can easily account for $20,000 to $40,000 in annual expenses, especially when housing, transportation, and state taxes are factored in.

These are illustrative examples only. Individual circumstances vary widely, and actual spending will depend on lifestyle, family size, health needs, and many other factors.

Let's ground this in a concrete scenario. Consider a hypothetical couple, both in their late 40s, currently living in the San Francisco Bay Area. They spend approximately $120,000 per year. Under the 25x rule, their FIRE number is $3,000,000. That's a real number that could take another decade or more to reach, depending on where their savings stand today.

Now imagine they explore two alternatives:

Scenario A: Relocate to Tucson, Arizona
Tucson consistently ranks among the more affordable mid-sized US cities. A comparable lifestyle, adjusted for lower housing costs, no state income tax on Social Security benefits, and lower overall price levels, might bring annual spending down to around $65,000 to $75,000. Using $70,000 as an estimate, their FIRE number drops to $1,750,000. That's $1,250,000 less to accumulate, which could mean retiring five to ten years earlier, depending on their savings rate and portfolio growth.

Scenario B: Relocate to Portugal (NHR or standard tax regime)
Portugal has become a popular destination for American early retirees, though tax rules there have evolved and it's worth consulting a cross-border tax professional. A frugal-to-comfortable lifestyle in cities like Porto or the Alentejo region might run $36,000 to $50,000 per year for two people, depending on lifestyle choices and housing arrangements. At $45,000 annually, the FIRE number becomes $1,125,000 - less than 40% of the original San Francisco target.

These figures are illustrative estimates only, based on general cost-of-living patterns. Actual costs vary significantly by neighborhood, lifestyle, family size, and currency fluctuations. Anyone considering an international move should research current conditions thoroughly and consult qualified financial and legal professionals.

Staying within the United States has obvious advantages: you keep your Medicare eligibility, remain in the same legal and banking system, and stay closer to family. But domestic geoarbitrage still offers substantial financial variation from state to state, and taxes are a big part of the picture.

State income taxes on retirement income differ dramatically. Some states, including Florida, Texas, Nevada, and Washington, have no state income tax at all. Others tax retirement account withdrawals (like 401(k) and traditional IRA distributions) as ordinary income, which can add thousands of dollars per year to your tax bill in retirement. Our complete guide to state taxes in retirement breaks down which states are friendliest to retirees and which ones quietly take a significant cut.

Beyond income taxes, property taxes, sales taxes, and even insurance costs vary widely. Florida, for example, has no income tax but can have high homeowners insurance costs in coastal areas due to hurricane risk. Tennessee has no income tax but does have sales tax rates among the highest in the country. The full picture matters.

Some locations worth researching for domestic geoarbitrage include:

• Asheville, NC (before considering recent storm recovery): Lower housing costs relative to larger cities, mild climate, strong arts community.
• Albuquerque, NM: Lower cost of living than most Western cities, with a different tax profile worth researching.
• Greenville, SC: Growing city with relatively affordable housing and no state tax on Social Security benefits.
• Boise, ID: Has seen significant price increases in recent years, making it less of a bargain than it once was - a reminder that cost-of-living rankings shift over time.
• Midwest college towns: Cities like Columbus, OH or Madison, WI offer amenities and culture at lower price points than coastal metros.

This list is a starting point for exploration, not a ranked recommendation. The right fit depends on personal priorities, healthcare needs, family proximity, and lifestyle preferences.

For anyone pursuing FIRE before age 65, healthcare is the variable that can unravel even the most carefully calculated budget. And it's the tradeoff that gets the most complicated when you factor in geography.

Domestically: If you retire before Medicare kicks in at 65, coverage options include the ACA marketplace, a spouse's employer plan, or COBRA for a limited transition period. ACA premiums and subsidy eligibility depend on your income, not your location, though the actual plans available and their networks vary by state and county. If you're modeling pre-Medicare healthcare costs, our article on the healthcare gap before Medicare covers the key numbers in detail.

Internationally: This is where many early retirees hit a wall. Medicare does not cover healthcare received outside the United States, with very limited exceptions. If you move abroad, you're essentially opting out of Medicare's value proposition until and unless you return to the US. Some countries have excellent and affordable healthcare systems, either through local public health coverage (which may or may not be accessible to foreign residents) or private international health insurance. Costs and quality vary enormously by country and individual health status.

For those considering international relocation, a few common approaches include:

• Purchasing an international private health insurance policy, which can range widely in cost depending on age, coverage level, and country.
• Taking advantage of the destination country's public health system if residency rules allow it (this varies greatly by country).
• Maintaining a strategic connection to the US, such as spending enough time stateside to preserve certain benefits or access to domestic healthcare when needed.

None of these is a perfect solution, and the right fit depends on age, health status, and risk tolerance. Consulting a health insurance broker experienced in expatriate coverage is a practical step for anyone seriously exploring international FIRE.

Let's be honest about what geoarbitrage actually involves, because the lifestyle influencer version and the real version aren't always the same thing.

Distance from family and friends. This is consistently cited as one of the most underestimated costs of relocating. Travel back home adds up financially and emotionally. If aging parents are in the picture, the calculus gets even more complicated. Some early retirees find that the money they save on cost of living gets partially spent on flights home.

Cultural adjustment. Moving internationally in particular involves a real learning curve around language, bureaucracy, banking, legal systems, and social norms. Some people thrive on this. Others find it exhausting. Being honest with yourself about which camp you fall into matters.

Currency risk. If your portfolio is in US dollars and your expenses are in euros, Mexican pesos, or Thai baht, exchange rate movements can significantly affect your real purchasing power. A currency shift of even 10 to 15 percent changes the math in ways that are hard to predict.

Social Security and tax implications. Your Social Security benefits are calculated based on your US earnings history and paid to you regardless of where you live, though some countries have tax treaties with the US that affect how benefits are taxed. The IRS also requires US citizens living abroad to file US tax returns regardless of where they reside, and foreign bank account reporting requirements (FBAR and FATCA) add administrative complexity.

The return option. Many early retirees who move abroad eventually return to the United States, often when healthcare needs increase or family circumstances change. It's worth thinking about whether your financial plan holds up if you end up moving back in your 70s.

None of these are reasons to dismiss geoarbitrage. They're reasons to go in with clear eyes rather than just a spreadsheet.

One of the most practical insights from people who've pursued geoarbitrage successfully is this: treat it as a test before you commit. Many early retirees spend one to three months in a prospective location before making any permanent decisions. Renting rather than buying initially preserves flexibility and lets you verify whether the lifestyle actually works before restructuring your entire financial plan around it.

A structured way to think through the location decision might involve asking:

• What is the realistic all-in annual cost of living in this location, including housing, food, transportation, healthcare, and entertainment? (Researching local Facebook expat groups, cost-of-living databases like Numbeo, and recent first-hand accounts from residents tends to be more accurate than generic rankings.)
• How does that figure change my FIRE number under the 25x framework?
• How does the state or country treat retirement income for tax purposes?
• What does healthcare look like, and what would it cost to replicate my current coverage?
• Is this a lifestyle I'd genuinely enjoy, or am I just chasing the number?

The last question is easy to skip but important. A lower FIRE number achieved by moving somewhere you're miserable isn't a win. The goal, for most people in the FIRE community, is more life, not just earlier retirement. That framing is explored in more depth in our piece on LeanFIRE vs FatFIRE vs CoastFIRE, which looks at how different approaches to spending shape the FIRE journey.

Geographic arbitrage is a powerful tool. Like all powerful tools, it works best when used thoughtfully.