More than 1.3 million Brazilians residing in the United States can now count their work time in the U.S. when applying for retirement due to age or disability and survivor benefits. Resulting from an international agreement between the two nations, the new policy took effect on Monday (October 1) and applies to workers in the general social security system as well as those in special regimes, such as public servants and military personnel.
Similarly, every American citizen residing in Brazil – an estimated number of over 35,000 – will have access to equivalent social security rights in the 
United States. The agreement establishes that each country is responsible for payment in its own currency.
In addition to facilitating the granting of these benefits, the measure also avoids double taxation for taxpayers who have worked in both countries. According to Renato Lopes, the coordinator of International Agreements at the National Institute of Social Security (INSS), the initiative protects workers by preventing economic losses.
“Many people are traveling to other countries and working there for significant periods. If they lose that time [as countable], even having contributed all those years and being unable to use it later for retirement, they will be harmed. Thus, the agreement is to ensure that people have these social security protections 
even if they work in other countries,” he argued.
Agreements
Brazil has already signed international social security commitments with several nations around the world. Currently, the country is a signatory to the Mercosur Multilateral Social Security Agreement (with Argentina, Paraguay, and Uruguay) and the Ibero-American Multilateral Social Security Convention (with Argentina, Bolivia, Chile, Ecuador, El Salvador, Spain, Peru, Paraguay, Portugal, and Uruguay).
The country also has separate bilateral agreements with Germany, Belgium, Cape Verde, Canada, Chile, South Korea, Spain, France, Greece, Italy, Japan, Luxembourg, Portugal, and Quebec (Canada).
Source: BrazilGovNews