On 14 October 2026 the Social Security Administration announced that benefits will rise by 3.6 percent in January 2027. It is the kind of number that travels well in headlines. The average retired worker's monthly check goes from an estimated $2,095 to $2,170, according to the agency's fact sheet. Nearly 72 million beneficiaries get the increase, and payments to about 7.3 million people on Supplemental Security Income rise from 31 December 2026.
For a retiree in Ohio, 3.6 percent is a reasonable description of what happened to their purchasing power. For a retiree in Mexico, Portugal or Panama, it is only one of three numbers that decide it, and often not the largest one. The adjustment is built to protect American prices. It was never designed to protect a life lived somewhere else, and anyone who plans retirement abroad around Social Security should understand exactly what it does and does not index.
What the COLA measures
The rule is set in law and applied mechanically. The COLA equals the increase in the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) from the third quarter of one year to the third quarter of the next. For 2027, the SSA compared July to September 2026 with July to September 2025 and found 3.6 percent.
Everything in that sentence is American. The basket is what American urban wage earners buy: rent in American cities, gasoline at American pumps, groceries at American prices. The result is a US dollar amount, wherever the beneficiary lives and whatever currency it is finally deposited in. Nothing in the formula looks at the price of a pharmacy visit in Guadalajara or rent in Lisbon, and nothing looks at what a dollar buys in either place.
That is not a flaw. It is a design choice that makes sense for a domestic programme. But it means the American abroad receives an inflation adjustment for a country they no longer spend in.
The second number: the exchange rate
Take the same measurement window the SSA used, the third quarter, and look at exchange rates over it. The Federal Reserve publishes daily rates; their quarterly averages tell a story the COLA does not.
In the third quarter of 2025, a dollar bought on average 18.63 Mexican pesos. In the third quarter of 2026 it bought 17.27, according to the Federal Reserve's peso series. That is about 7.3 percent fewer pesos per dollar. Convert the average benefit at those rates and the result runs backwards: the pre-COLA $2,095 was worth about 39,000 pesos at the 2025 average, while the post-COLA $2,170 is worth about 37,500 pesos at the 2026 average. A 3.6 percent raise in dollars became roughly a 4 percent cut in pesos.
The Brazilian real shows the same pattern. A dollar bought 5.45 reais on average in the third quarter of 2025 and 5.14 a year later. In reais, the average benefit after the increase is about 2.4 percent lower than before it.
Other currencies moved the opposite way. The dollar bought about 1.6 percent more Canadian dollars and about 1.6 percent more euros on the same quarterly comparison. For a retiree in Canada or the eurozone, the COLA and the currency worked together: the average benefit rose by a little over 5 percent in local money.
Then look at how fast the picture shifts. On 16 October 2026, two days after the announcement, a dollar bought 18.50 pesos, almost back to the 2025 average. At that day's rate the post-COLA benefit would be worth nearly 3 percent more pesos than the pre-COLA benefit a year earlier. Same benefit, same raise, opposite conclusion, depending on which week you convert.
The point is not that any one of these figures is the right one. The point is that currency swings over a single year were larger than the COLA itself, in both directions, and the COLA cannot see them.
The third number: local prices
Even a stable exchange rate would not settle the question, because prices abroad move on their own schedule. A retiree in a country where rents, healthcare or imported goods are rising faster than American prices loses ground even when the currency holds still. One in a country with lower inflation gains.
The dollar figure on the January notice is therefore the first step of a calculation, not its result. The real change in a retiree's living standard abroad is roughly the COLA, plus or minus the move in the exchange rate, minus local inflation. Two of those three terms are outside American statistics altogether.
The number behind all three: the trust fund
There is a longer horizon too. The 2026 Trustees Report summary states that the Old-Age and Survivors Insurance trust fund can pay full scheduled benefits until the fourth quarter of 2032, one quarter earlier than projected a year before. At that point, continuing income would cover 78 percent of scheduled benefits. Taking the retirement and disability funds together, which would require a change in law, the date is the third quarter of 2034, with 83 percent payable.
The trustees name three reasons the long-term outlook worsened this year: a lower assumed fertility rate, lower assumed immigration and the effect of the 2025 tax law on revenue from the income taxation of benefits. They also note that lawmakers have many options to close the gap, and that acting sooner allows a broader range of them.
Nobody can say what Congress will do before 2032. But a 64-year-old American planning to retire abroad today can expect to be drawing benefits when that date arrives. A plan that treats the current benefit, indexed and secure in dollars, as the fixed point of a retirement budget abroad is resting on two assumptions at once: that the formula will still be paid in full, and that the dollar will still buy what it buys today.
The other January numbers
The COLA is not the only figure that changes in January. The SSA's fact sheet lists several that matter to Americans abroad who are still working or about to claim:
- the maximum earnings subject to Social Security tax rise from $184,500 to $192,300;
- a quarter of coverage, the unit in which work credits are earned, rises from $1,890 to $1,970 of earnings;
- under the retirement earnings test, a beneficiary below full retirement age can earn $25,560 a year before $1 in benefits is withheld for every $2 above the limit, and $67,920 in the year full retirement age is reached, with $1 withheld for every $3 above it.
There is also a practical point for anyone living outside the United States. The SSA says personalised COLA notices appear in the online my Social Security account from late November, and that people who want to see theirs online must create an account and enrol in paperless notices by 18 November. Everyone else gets a paper notice by post in December. For a retiree whose mail crosses an ocean, the online route is the faster one.
Why this matters more abroad than at home
At home, the three risks partly cancel. If American prices rise, the COLA follows. If the dollar weakens, imported goods cost more, but most spending is domestic. The system is built around a household that earns, spends and saves in one currency.
Abroad, the risks stack. The benefit is in dollars, spending is in pesos or euros, and the adjustment follows American prices. On top of that, the United States taxes its citizens wherever they live, as the Brief explained in its piece on citizen-based taxation, and the country of residence may tax the same benefit unless a treaty says otherwise. Some countries do not tax foreign pensions at all; the Brief's list of countries that don't tax foreign pension income is a starting point, but the treaty with the United States decides the details.
None of this argues against retiring abroad on Social Security. It argues against treating the benefit as a fixed real income. It is a fixed dollar income, adjusted to American prices, with a known funding date in the next decade.
What a sound plan does instead
Several habits follow from the facts above.
Budget in the local currency, not in dollars. A monthly cost of living abroad, of the kind the Brief set out in what a Plan B actually costs per month, should be compared with the benefit converted at a conservative rate, not at last month's.
Look at the exchange rate over years, not weeks. The swing between the third-quarter average and mid-October 2026 shows how misleading a single reading can be. A plan that only works at a favourable rate is not a plan.
Keep a buffer in the spending currency. A reserve held locally smooths the months when the dollar is weak, without forcing conversions at the worst moment.
Model the 2032 scenario. Run the budget once with the full benefit and once with about four-fifths of it. If the second version fails, the plan needs other income, not hope.
Keep the filing side clean. The benefit is reported on the US return each year, and foreign accounts used to receive it may count toward FBAR and FATCA thresholds. The Brief covered the annual cycle in its piece on the 15 October deadline for Americans abroad.
The 3.6 percent is real, and for most beneficiaries it is welcome. It simply answers a question about American prices. Americans abroad have to answer the other two questions themselves.
Work with Sebastian
If you are an American planning or living a retirement abroad and want your income, currency, tax residence and US filing obligations looked at as one plan rather than four, that is the kind of cross-border setup Sebastian works on with internationally mobile clients. Book a consultation.
