Will Spain Tax Your Social Security?
If you are planning to retire in Spain on US Social Security, the answer is more nuanced than most posts suggest — and more nuanced than the question implies.
The short version: under the US-Spain Double Taxation Convention, US Social Security is primarily taxable in the United States, not Spain. Spain should not directly tax it. But — and this is the part most content misses — you are still required to declare it on your Spanish tax return, and Spain may use it to calculate the rate applied to your other income. That distinction matters, and this post explains exactly what it means for you.
During webinars we have run with EY tax lawyers and cross-border financial specialists, this question came up repeatedly. The consistent answer from our experts: you include Social Security on your Spanish return, you should get relief so you are not directly taxed on it in Spain, but the amount may affect your overall tax rate on other income. One of our advisors put it plainly: "you will have one exempt and one part you will have to pay on" — referring to the exemption with progression mechanism.
This post unpacks what that means in practice: the treaty framework, the declaration obligation, the progression effect, what Spain CAN tax alongside your Social Security, and what to sort before you move.
What the US-Spain treaty actually says about Social Security
The US and Spain have a bilateral tax treaty — the Convention for the Avoidance of Double Taxation, in force since 1990. Under its provisions on social security, benefits paid under the social security legislation of one country are primarily taxable in that country. For US Social Security, that means the US has the primary taxing right.
In my recent webinar, Rob — a cross-border financial specialist working with US expats in Spain — explained it this way: "The double taxation treaty states the US will only tax it, but you need to include it on your Spanish tax return still. It might still be included in your income for that year. But you should be able to get relief on the Spanish side due to the double taxation agreement."
The EY tax lawyer on the same webinar confirmed: "You still have to include it on your modello and your income tax return, but you shouldn't have to pay tax."
So the treaty protects you from Spain directly taxing your Social Security income. But it does not mean the income disappears from your Spanish tax picture entirely.
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Talk to an expertThe exemption with progression: the part most posts skip
Spain operates a mechanism called "exemption with progression" for certain treaty-protected income. The way it works: the Social Security income itself is exempt from Spanish income tax — you do not pay Spanish tax directly on it. However, Spain may add it to your other taxable income when calculating which tax band applies to that other income.
In practical terms: if you receive €20,000 in Social Security and €30,000 in IRA distributions, Spain may use the combined €50,000 figure to determine your tax rate — then apply that rate only to the €30,000 IRA income. The Social Security is not taxed directly, but it pushes your IRA distributions into a higher band than they would otherwise occupy.
In my webinar, this was addressed when asked about Social Security disability income: "You will have one exempt and one part you will have to pay on it" — describing exactly this split between the exempt element and the progression effect on other income.
Does this apply to all nationalities, or just US citizens?
The US/Spain treaty covers US citizens specifically. If you hold a different passport, the rules depend on whether your home country has its own tax treaty with Spain — and what that treaty says.
UK state pension
The UK and Spain have a separate double taxation agreement. Under that treaty, UK state pension is generally taxable only in the UK — so the same protection applies for British retirees in Spain. However, UK government service pensions (paid to former civil servants, teachers, police officers, and similar) are treated differently and may be taxable in Spain. If you receive a UK state pension, you are protected. If you receive a UK government service pension, check with a cross-border advisor.
Canadian CPP and OAS
Canada and Spain also have a tax treaty. Canadian pension income — including Canada Pension Plan and Old Age Security — is generally taxed in the country where you are resident, meaning Spain would have taxing rights. This is the opposite of the US arrangement. Canadian retirees in Spain should get specific advice, as the protection US citizens enjoy under their treaty does not automatically apply.
Australian Age Pension
Australia does not have a comprehensive tax treaty with Spain. Australian retirees in Spain face a more complex situation and should seek specialist advice on how their pension income is treated.
The rest of this post focuses on US citizens and US Social Security specifically.
What Spain DOES tax alongside your Social Security
The Social Security protection is real — but it does not extend to all US income. If you have other income sources alongside Social Security, those are treated very differently. And as explained above, your Social Security amount may affect the rate Spain applies to those other sources.
In Webinar 4, Gabriela was clear on the general principle: "It doesn't matter how much is your pension in another country — Spain is going to tax it as a salary. The only way you are not going to pay taxes on your pension is if it is a federal pension." Social Security sits in a protected category. Most other retirement income does not.
Here is a quick reference for the most common income types:
Hello, World!
| Income type | Taxable in Spain? | Taxable in US? |
|---|---|---|
| US Social Security | Exempt but declared — may affect rate on other income | Possibly, depending on total income |
| Traditional IRA distributions | Yes — ordinary income | Credit available via treaty |
| Roth IRA distributions | Partially — gains may be taxable | No (qualified distributions) |
| US private pension | Yes — ordinary income | Credit available via treaty |
| US rental income | Yes — investment income | Yes — Foreign Tax Credit applies |
| VA disability benefits | No | No |
The key distinction is between Social Security — which the treaty specifically reserves for US taxation only — and other retirement income, which follows different treaty provisions and is generally taxable in the country where you are resident, i.e. Spain.
This matters practically: if you receive both Social Security and IRA distributions in retirement, your Spanish tax return will include the IRA withdrawals but not the Social Security payments. Depending on your income split, this distinction can significantly reduce your Spanish tax liability compared to what most people initially fear.
For a full explanation of how IRA distributions are taxed in Spain, see: How Is Your IRA Taxed in Spain?
Do you still file a US tax return when living in Spain?
Yes — always. As a US citizen, you are required to file a US federal tax return every year regardless of where in the world you live. This does not change when you move to Spain.
What does change is the complexity of that return, because you now need to account for income taxed in Spain and claim the appropriate credits to avoid being taxed twice on the same money.
Is your Social Security taxable on your US return?
Possibly — and this surprises people who assume the treaty protection means they pay nothing at all on their Social Security.
The US taxes Social Security based on your combined income: your adjusted gross income, plus any non-taxable interest, plus half of your Social Security benefit. If that combined figure exceeds certain thresholds, up to 85% of your Social Security benefit becomes taxable in the US.
The thresholds for 2025 are:
Single filers: combined income above $25,000 — up to 50% of benefits taxable. Above $34,000 — up to 85% taxable.
Married filing jointly: combined income above $32,000 — up to 50% taxable. Above $44,000 — up to 85% taxable.
The treaty protects you from Spain taxing your Social Security. It does not protect you from the US taxing it under its own domestic rules. These are two separate questions and both matter.
Should your Social Security go into a US or Spanish bank account?
This question comes up regularly and the short answer is: it does not affect your tax treatment either way. Spain taxes based on tax residency and income type — not on which bank account the money lands in.
That said, there are practical considerations worth thinking about:
If you keep your Social Security payments in a US account and transfer money to Spain as needed, you will be making regular currency exchanges — which carries FX costs and some exchange rate risk. A currency specialist can help reduce those costs significantly compared to bank-to-bank transfers.
If you direct Social Security payments to a Spanish account, the Social Security Administration will pay in USD and your bank will convert to euros at whatever rate applies on that day. You lose control over the timing and rate of the conversion.
Some retirees maintain a US account for Social Security and investment income, and a Spanish account for day-to-day living expenses, transferring periodically in larger amounts at favourable rates. This is a common and sensible approach.
The Social Security Administration does pay directly to foreign bank accounts in many countries including Spain, if you prefer to simplify the flow. Details are available on the SSA website.
What about VA benefits, disability income and military pensions?
These come up frequently and each is treated differently. Here is a clear breakdown:
VA disability compensation
VA disability compensation paid to veterans is generally not taxable in the US and is not included in the income thresholds used to calculate Social Security taxation. Spain does not tax it either — it falls outside the category of taxable income under both systems. If VA disability is your primary income, your Spanish tax situation is likely to be straightforward.
Military retirement pension
This is different from VA disability and is treated differently under the treaty. Military retirement pensions paid by the US government are generally taxable only in the US — similar to Social Security — because they are government service pensions covered by a specific treaty provision. However, the rules here are more nuanced than for Social Security, and the specific provision depends on the nature of the service and the type of payment. If you receive military retirement income and are planning to move to Spain, confirm the treatment with a cross-border tax advisor rather than relying on the general Social Security rule.
SSDI (Social Security Disability Insurance)
SSDI is paid under the same Social Security legislation as retirement benefits and generally receives the same treaty treatment — declared in Spain but primarily taxable in the US. However, in Webinar 4, Gabriela noted that for Social Security disability income specifically, "you will have one exempt and one part you will have to pay on it" — suggesting the same exemption with progression dynamic applies. If you receive SSDI and are moving to Spain, confirm the current treatment with a cross-border tax advisor.
SSI (Supplemental Security Income)
SSI is a means-tested benefit rather than a contributory social insurance payment. It is also generally not payable outside the US — the SSA requires you to be physically present in the US to receive SSI. If you are moving to Spain permanently, SSI payments will typically stop. This affects a small number of people but is worth knowing.
Does Social Security need to be declared on Form 720?
No. Form 720 — the Modelo 720 — is Spain's declaration of overseas assets. It applies to bank accounts, investments, and property held abroad above €50,000 per category. Social Security is an income stream, not an asset, and does not need to be declared on Form 720.
However, if you have a US bank account where your Social Security payments accumulate, and that account holds more than €50,000 at any point during the year, the account itself — not the Social Security income — would need to be declared. The asset declaration applies to the account balance, not to the source of the funds.
If you are not familiar with Form 720, it is one of the most important compliance requirements for US expats in Spain and is entirely separate from your Spanish income tax return. For more on this, see the Form 720 section in: How Is Your IRA Taxed in Spain? [INTERNAL LINK]
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Get a free call from an expert to help manage your savings, investments, and retirement accounts for a smooth transition abroad.
Talk to an expertSummary: five things to know about Social Security in Spain
Under the US-Spain Double Taxation Convention, US Social Security is primarily taxable in the US — Spain should not directly tax it. But you must still declare it on your Spanish tax return every year.
Spain may apply "exemption with progression" — using your Social Security income to push your other taxable income (IRA distributions, pensions) into a higher tax band. The Social Security itself is exempt; the effect on your other income is not.
Other retirement income — IRA distributions, private pensions, rental income — is not protected in the same way. Spain taxes most of these as ordinary income once you are a tax resident.
VA disability compensation is generally not taxable in either country. Military retirement pensions are usually taxable only in the US but the specific rules are more nuanced — get advice if this applies to you.
Social Security payments do not need to be declared on Form 720, but US bank accounts where those payments accumulate may need to be declared if the balance exceeds €50,000.
This article is for informational purposes only and does not constitute tax or financial advice. Tax rules change, and individual circumstances vary significantly. Nothing in this post should be relied upon as advice specific to your situation. Before making any decisions about your retirement income in connection with a move to Spain, speak with a qualified cross-border tax advisor and a licensed financial planner with experience in US-Spain matters.
