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Retirement PlanningJune 09, 2025

Understanding the Different Types of US Retirement Accounts

Hoxton BlogUnderstanding the Different Types of US Retirement Accounts

  • Retirement Planning

For Americans living abroad, or those with past ties to the US, the rules around retirement accounts can feel overwhelming. With different account types, tax treatments, contribution limits, and withdrawal rules, it’s not always clear how to manage your savings effectively, especially across borders.

If you’ve ever held a 401(k), IRA, or other US-based retirement account, this article is for you. We’ll walk through the key types of retirement accounts, what makes them different, and what expats should consider when managing or planning around them.

US Retirement Accounts Explained

There are a range of different retirement accounts in the US, all with their own individual set of tax benefits, limitations and access rules. Even within the accounts below, your own personal suitability will be different based on your situation and things like your US employer’s contribution matching policy.

Here are some of the most common retirement accounts in the US:

  • 401(k) Plans

    A 401(k) is one of the most well-known US retirement accounts. Offered by employers, these plans allow individuals to contribute pre-tax earnings from their salary, reducing taxable income today while deferring tax until retirement withdrawals begin. Many employers match a portion of contributions, which is effectively free money.

    There’s also the Roth 401(k) option. With this version, contributions are made with after-tax income, but future withdrawals are tax-free if certain conditions are met.

    Annual contribution limits for 2025 are $23,500, with an additional $7,500 allowed for those aged 50 and over and $11,250 for those aged 60-63.

  • Traditional and Roth IRAs

    Individual Retirement Accounts (IRAs) are not tied to an employer. A Traditional IRA works similarly to a 401(k), contributions may be tax-deductible depending on your income and other circumstances, and tax is paid when money is withdrawn in retirement.

    A Roth IRA flips this around. Contributions are not tax-deductible, but future withdrawals are tax-free, provided you meet the age and timing requirements. Roth IRAs are particularly useful for those expecting to be in a higher tax bracket in retirement.

    The IRA contribution limit for 2025 is $7,000, or $8,000 for those aged 50+.

  • SEP IRAs and SIMPLE IRAs

    These are designed for self-employed individuals and small business owners.

    • A SEP IRA (Simplified Employee Pension) allows larger contributions based on a percentage of income, up to 25% of compensation or $69,000 in 2025, whichever is lower.
    • SIMPLE IRAs (Savings Incentive Match Plan for Employees) are designed for businesses with fewer than 100 employees and allow both employee and employer contributions.

    These accounts are great tools for entrepreneurs or contractors but can be complex when considered alongside international income and reporting requirements.

  • Other Plans: 403(b) and 457

    These are more specialised retirement plans for employees in public education, government, or non-profit sectors. They follow similar tax rules to 401(k) plans but often have different investment options and restrictions.

    While not as common among expats, it’s worth noting if you’ve previously worked in one of these sectors.

Key Differences to Understand

Each account type has unique features. One major distinction is between pre-tax and after-tax contributions. Traditional 401(k)s and IRAs give you a tax break now, but tax your withdrawals later. Roth versions offer no immediate tax relief but allow for tax-free withdrawals in retirement.

Required minimum distributions (RMDs) are another factor. Traditional accounts generally require you to start withdrawing (and paying tax) by a certain age (currently 73), while Roth IRAs don’t have RMDs during your lifetime.

Contribution limits, eligibility rules, and the tax treatment of withdrawals vary too. This becomes especially important when you’re living outside the US and need to factor in international tax laws and currency risks.

Key Issues for Expats to Consider

Living abroad doesn’t mean your US retirement accounts disappear. In fact, you can often continue contributing (depending on your income and tax residency), consolidate existing accounts, or leave them invested.

However, expats need to consider a few extra layers:

  • Currency risk. Your expenses might be in pounds or euros, while your retirement accounts are in US dollars. Currency swings can affect the value of your income in retirement.
  • Cross-border tax rules. Depending on your country of residence, your US retirement account could be taxed differently, or even penalised. Understanding how your host country treats US-based accounts is essential.
  • Double reporting. In some cases, you’ll need to report your retirement accounts on both US and foreign tax filings. Failing to do this properly can lead to fines or double taxation.

Expats are also more likely to consider pension transfers, rollovers, or consolidations to simplify their financial life. These decisions require careful planning to avoid unexpected tax liabilities or compliance issues.

Many expats don’t realise that you can maintain a 401(k) or IRA even while living abroad. And in many cases, rolling older accounts into a more modern IRA structure can improve flexibility and reduce administrative burdens.

How Tech Can Help Manage US Retirement Accounts Abroad

It’s hard enough keeping track of retirement accounts when you live in one country. Add multiple currencies, foreign tax laws, and time zone differences, and it’s easy to lose track of where you stand.

That’s why tools like the Hoxton Wealth App are so valuable. It gives you full visibility into your retirement savings, lets you track your net worth across accounts and currencies, and helps you plan for retirement using real-world assumptions and projections.

For expats, features like multi-currency account tracking and goal-based planning provide a sense of control that traditional spreadsheets or fragmented account dashboards can’t.

Final Thoughts

If you have US retirement accounts, understanding your options and the differences between them is crucial to making the most of your savings. Whether you’re still contributing, preparing for retirement, or evaluating rollover options, getting expert advice is the smart move.

At Hoxton Wealth, we specialise in helping expats make informed financial decisions across borders. And with tools like the Hoxton Wealth App, you can simplify your retirement planning and feel more confident about the future, wherever in the world you choose to live.

To speak to one of our expert financial advisors, get in touch today.

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If you would like to speak to one of our advisers, please get in touch today.

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Alan Turner

June 09, 2025

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