All pension benefit plans and welfare benefit plans covered by ERISA must file a Form 5500 or Form 5500-SF for a plan year unless they are eligible for a filing exemption. (See Code sections 6058 and 6059 and ERISA sections 104 and 4065).
ERISA also does not cover plans maintained outside the United States primarily for the benefit of nonresident aliens or unfunded excess benefit plans.
You may have to file multiple forms to report the details of your foreign pension, such as: Form 3520: Required if you have any transactions with a foreign trust. Form 3520-A: Required to be filed by the company that manages your foreign pension. Form 8621: Required if PFIC rules apply.
Qualified plans include 401(k) plans, 403(b) plans, profit-sharing plans, and Keogh (HR-10) plans. Nonqualified plans include deferred-compensation plans, executive bonus plans, and split-dollar life insurance plans.
ERISA also does not cover plans maintained outside the United States primarily for the benefit of nonresident aliens or unfunded excess benefit plans.
However, not all retirement plans are covered by ERISA. For example, Federal, state, or local government plans and some church plans are not covered.
ERISA exempts only two types of employers: Employee benefit plans maintained by governmental employers are exempt from ERISA's requirements. This exemption includes plans maintained by the federal, state or local (for example, a city, county or township) governments. Church plans are also exempt from ERISA.
Common types of employer-sponsored retirement accounts that fall under ERISA include 401(k) plans, pensions, deferred-compensation plans, and profit-sharing plans. In addition, ERISA laws don't apply to simplified employee pension (SEP) IRAs or other IRAs.
In general, ERISA does not cover plans established or maintained by governmental entities, churches for their employees, or plans which are maintained solely to comply with applicable workers compensation, unemployment or disability laws.