FERS and CSRS in Divorce

A federal civilian divorce is rarely a single-order case. FERS has a basic annuity, TSP, and Social Security; CSRS has a basic annuity and (often) a small CSRS-Offset interaction. Each component has its own order type, its own administering agency, and its own drafting language. Missing one component leaves money on the table for the alternate payee.

Federal retirement is two systems, not one

Federal civilian retirement runs through two different agencies. The pension (CSRS or FERS, called the basic annuity) is administered by the Office of Personnel Management (OPM). The Thrift Savings Plan, the federal defined-contribution plan, is administered by the Federal Retirement Thrift Investment Board (FRTIB). They are separate components, divided by separate orders, processed on separate timelines, and the two agencies do not coordinate with each other.

Neither agency interprets intent. Each administers exactly what its order says. A defective order can surface months after the divorce is final, which is why the language matters before the decree is entered.

FERS vs CSRS: which system applies

The Court Order Acceptable for Processing (COAP)

The COAP is the order that divides the basic annuity. OPM publishes a handbook of acceptable language (the "Handbook for Attorneys on Court-Ordered Retirement, Health Benefits, and Life Insurance"). Orders that follow the OPM patterns are accepted; orders that deviate are routinely rejected. Pre-submission to OPM is available and recommended.

OPM processing of a divorce-related order is slow and still largely manual, and a rejected order goes back to the end of the queue. An order that is acceptable on first submission is the single biggest thing within anyone's control to avoid added months of delay. Getting the COAP right the first time is the point.

What the COAP awards

• A marital share of the basic annuity, usually computed by coverture fraction (marital months of creditable federal service over total creditable federal service at retirement).
• A specific dollar amount or a percentage of the gross monthly annuity.
• For FERS, a share of the Annuity Supplement (must be addressed specifically; default is not divided).
• A former spouse survivor annuity (up to 55%) payable after the retiree's death.
• FEHB (health insurance) and FEGLI (life insurance) eligibility for the former spouse, where applicable.

The coverture fraction

The OPM standard formula is the marital share expressed as a coverture fraction: months of creditable federal service during the marriage, divided by total months of creditable federal service at retirement, multiplied by the agreed marital-share percentage of the basic annuity. The fraction adjusts automatically for service the participant performs after the divorce, so a participant who keeps working accrues additional non-marital benefit that does not go to the former spouse.

How the award is expressed affects cost-of-living adjustments

How an award is written affects how cost-of-living adjustments (COLAs) apply to it. OPM generally treats a percentage or formula award and a fixed-dollar award differently for COLA purposes: a percentage or formula share tends to move with the annuity over time, while a fixed-dollar amount tends not to unless the order provides otherwise. This is general agency mechanics, not a recommendation about any particular order. The drafting consequences in a specific case are a matter for counsel.

When the former spouse can actually be paid

Eligibility to retire is not the same as being retired. For the basic annuity, the former spouse generally receives nothing until the participant actually retires and applies for benefits. A COAP can be drafted and accepted years before that, but the payment stream starts when the participant retires, or, for a survivor annuity, when the participant dies.

A refund of contributions can end the annuity

Under federal rules, an employee who leaves federal service before retiring may request a refund of their own retirement contributions. Taking that refund can extinguish the annuity itself. This is general information about how the benefit works, not advice about any specific case; it is noted here because it is a feature of the federal system that affects what an annuity-based order is dividing.

The Former Spouse Survivor Annuity

Federal civilian survivor coverage is one of the highest-value items in a federal divorce and one of the most commonly missed. The COAP can award the former spouse up to 55% of the basic annuity as a survivor benefit, payable from the retiree's death until the former spouse's death.

What to know about survivor coverage

• Election deadlines. Federal regulations include strict time limits for survivor-benefit elections after divorce. Missing the window can permanently bar coverage.
• Cost. Survivor coverage reduces the retiree's monthly annuity. The COAP should specify how the cost is allocated between the parties.
• Remarriage. A former spouse who remarries before age 55 generally loses the survivor benefit. The order can require notification.
• Multiple former spouses. Survivor coverage cannot exceed 55% in total. If the retiree was previously divorced with a survivor benefit awarded, the available coverage for a subsequent former spouse may be limited.

The FERS Annuity Supplement

Some FERS employees who retire before age 62 and meet certain service requirements receive an Annuity Supplement that approximates the Social Security benefit they earned through federal service. The Supplement is paid by OPM, not by Social Security, and stops at age 62 or earlier Social Security claiming.

The Annuity Supplement is potentially divisible by COAP, but the order has to specifically address it. A COAP that divides "the basic annuity" only does not reach the Supplement, and the participant retains 100% of it. For a participant retiring before 62 with significant federal service, the Supplement can be a meaningful slice of the early-retirement income. Whether and how a supplement is treated in any given division is fact-specific.

Social Security in a FERS or CSRS divorce

Social Security is governed by federal statute and administered by SSA. It is not divided by court order, not addressed in the COAP, and not subject to negotiation in the settlement. What matters for divorce planning is the statutory rule: a former spouse married to a Social Security earner for at least 10 years may claim a spousal benefit based on the earner's record after age 62. The claim does not reduce the earner's benefit and does not require any action in the divorce.

CSRS earners do not pay Social Security on their federal service. A long-term CSRS-only employee may have minimal Social Security coverage on the federal side, although they may have other Social Security from prior or concurrent non-federal employment. The Government Pension Offset and Windfall Elimination Provision, which historically reduced Social Security for many CSRS retirees and certain public-pension spouses, were repealed by the Social Security Fairness Act signed in January 2025; current SSA guidance controls how benefits are now calculated.

The two-order pattern in a FERS divorce

A FERS employee divorce typically requires two separate orders, not one:

1. The COAP, drafted to OPM's acceptable-language patterns, dividing the basic annuity, addressing survivor coverage, and (if applicable) addressing the Annuity Supplement.
2. The TSP RBCO, drafted to FRTIB's procedures, dividing the TSP balance and creating a separate TSP account for the former spouse.

Each order goes to its own agency on its own timeline. OPM and FRTIB do not coordinate. The drafting attorney has to track both. See the TSP in Divorce guide for the RBCO side.

What TOVA needs to start

• System identification (CSRS, CSRS-Offset, or FERS) from the LES or OPM annual statement.
• Service computation date (SCD) and hire date.
• Retirement date if already retired, or projected retirement date if not.
• Current annuity amount (if retired) or estimated annuity (if pre-retirement).
• Date of marriage and date of separation or divorce.
• Settlement agreement or proposed terms covering basic annuity, survivor benefit, and FERS Annuity Supplement (if applicable).
• TSP balance if applicable (handled separately under the RBCO).

What TOVA does not do

• We do not provide legal advice. Counsel makes the legal calls.
• We do not provide tax advice. The client's CPA handles tax.
• We do not make strategic litigation decisions. We document what the records show and what the plan can administer.
• We do not communicate with OPM on the parties' behalf during the divorce.

For related context, see the TSP in Divorce guide, the pension division guide (shared-payment vs separate-interest mechanics), the uniformed-service retired pay guide (USFSPA, not the same as COAP), the Social Security in divorce guide for the Fairness Act repeal of WEP and GPO affecting CSRS retirees, the order type guide, and the QDRO rejection diagnosis guide.