Expat Totalization Agreement Savings Calculator
Calculate how much the US–[country] totalization agreement saves self-employed US expats from paying dual Social Security taxes. Without the agreement, you'd owe US SE tax (15.3%) AND the host country's equivalent simultaneously.
How US Totalization Agreements Eliminate Double SE Tax
Without a totalization agreement, a US self-employed citizen living and working abroad would owe both US self-employment tax (15.3% on net income up to $176,100) AND the host country's equivalent social insurance tax. This double taxation can cost 25–40% of income before any income tax is paid. The US has signed 30+ totalization agreements with countries including the UK, Canada, Australia, Germany, Japan, France, Italy, Spain, and the Netherlands.
Under a totalization agreement, your Social Security tax liability is assigned to one country only. For self-employed individuals, coverage typically follows the country of residence. For employees on temporary international assignments (5 years or less for most treaties), the "detached worker" rule keeps you covered under your home country's system. You obtain a Certificate of Coverage from the relevant agency (for US: SSA Form SSA-2490) to prove exempt status to the host country. Source: ssa.gov/international/agreements_overview.html. Last updated: May 2026.
Host Country Social Security Rates (2026)
| Country | Self-Employed Rate | Cap / Notes | Agreement In Force |
|---|---|---|---|
| United Kingdom | ~14% (Class 2 + 4) | Flat weekly + 6% above threshold | Yes — US–UK Treaty |
| Canada (CPP) | 11.9% | Capped at $73,200 CAD (2026) | Yes — US–Canada Treaty |
| Australia (Superannuation) | ~10.0% (SGC) | Compulsory super on earnings | Yes — US–Australia Treaty |
| Germany | 18.6% | Half employer + half employee portion | Yes — US–Germany Treaty |
| Japan | 18.3% | Varies by pension fund | Yes — US–Japan Treaty |
| France | ~17.75% | RSI contributions for self-employed | Yes — US–France Treaty |
| Spain | 28.3% | RETA (Régimen Especial Trabajadores Autónomos) | Yes — US–Spain Treaty |
| Italy | 24.0% | INPS Gestione Separata | Yes — US–Italy Treaty |
| Netherlands | 22.05% | Combined AOW + other | Yes — US–Netherlands Treaty |
| Mexico | ~10.6% | IMSS quotas | Yes — US–Mexico Treaty |
Rates shown are approximate combined self-employed rates for 2026. Actual rates depend on specific income levels, coverage caps, and country-specific rules. The US SE tax applies to 92.35% of net income (up to $176,100 for Social Security). Host country caps vary significantly — always verify with a tax professional familiar with the specific treaty. Source: ssa.gov/international, each country's social security administration website.
How to Claim Totalization Agreement Benefits
To claim exemption from the host country's social security tax while remaining covered under US SE tax: (1) Obtain a Certificate of Coverage from the Social Security Administration — submit Form SSA-2490 or use the online request at ssa.gov; (2) Provide the certificate to your host country's social security authority to document your exemption; (3) Continue filing Schedule SE and paying US SE tax as normal; (4) Do NOT pay host country social contributions for the covered period. If you instead choose host country coverage, the process is reversed — apply through the host country's authority for an exemption from US SE tax. Detached worker provisions typically last 5 years; extensions may be available. Source: ssa.gov/international/CoC_link.html.