A retired E6, or a Sergeant First Class in the U.S. Army, would receive retirement pay based on their length of service and highest rank achieved. The retirement pay is calculated based on a percentage of the average of the highest 36 months of basic pay.

For an E6 with 20 years of service, their retirement pay would be calculated at 50% of the average of the highest 36 months of basic pay. The basic pay for an E6 with over 20 years of service in 2021 is $3,935.40 per month. This means that an E6 who has served for 20 years or more and retires in 2021 would receive a retirement pay of approximately $1,967.70 per month.
However, it is important to note that there are other factors that can impact retirement pay, such as disability status, years of service, and whether the retiree has elected to participate in the Survivor Benefit Plan (SBP). Additionally, the actual retirement pay can vary depending on the individual’s specific situation, such as years of active duty service, number of days served on active duty during the highest 36 months of basic pay, and any other relevant factors.
In addition to retirement pay, retired E6s may also be eligible for other benefits, such as health care coverage through TRICARE and access to military base facilities. These benefits can vary depending on the retiree’s specific circumstances and eligibility criteria.
It is also worth noting that retirement pay for military personnel is subject to annual cost-of-living adjustments (COLA) based on the Consumer Price Index (CPI). This means that the retirement pay of a retired E6 will increase each year to keep up with inflation.
In conclusion, a retired E6 with 20 years of service can expect to receive retirement pay of approximately $1,967.70 per month in 2021, based on 50% of the average of the highest 36 months of basic pay. However, retirement pay can vary depending on factors such as disability status, years of service, and whether the retiree has elected to participate in the Survivor Benefit Plan. Additionally, retired E6s may be eligible for other benefits, such as health care coverage and access to military base facilities, and their retirement pay is subject to annual cost-of-living adjustments based on the CPI.