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Coast FIRE Calculator for Military Members

Military retirement, separation and pension start dates do not always happen at the same time. Enter your actual TSP balance and official benefit estimates to compare military career scenarios against one Coast FIRE plan.

BRS & Legacy High-3TSP & Continuation PayActive & Reserve Transitions
CONFIGURATION

Your Military Coast FIRE Plan

Official Military Benefit Notice:

Use the retirement estimate from your official military retirement resources for the exact service scenario you are modeling.

Check official DoD retirement calculators (External) ↗
Retirement Asset BreakdownTotal: $150,000
Is TSP/retirement contribution already deducted from your entered take-home?
PRIMARY POSITION

Your Military Coast FIRE Position

Below Modeled Coast Target
Pension-Aware Coast FIRE Target Today
$262,347

At age 60, planned spending of $60,000/yr is offset by your $28,000/yr military retired pay starting at age 42. Your net portfolio requirement is $800,000. With compound growth over 30 years, $262,347 invested today across TSP and other accounts reaches that target with zero further contributions after exit.

Combined Investments
$150,000
Gap / Surplus
-$112,347
Monthly Cash Margin
$700
Projected @ 60
$805,132
Mil Exit Age: 42Retired Pay Start: Age 42Gap Duration: 0 Years

Military Coast FIRE Path by Service Scenario

Compare portfolio trajectories from age 30 to 60

COAST @ AGE 60
Current Military Path
Alternative Service Path
Coast Path ($0 New Contrib)
Pension-Aware Target

What Changes If You Leave the Military at Different Dates?

Separation Scenarios

Compare up to 3 official benefit estimates, separation dates, and pre-exit TSP contributions without automated formula guesses.

Scenario 1: Early Separation
Pension Target:$491,900
Projected @ 60:$526,639
Scenario 2: Mid-Career Exit
Pension Target:$491,900
Projected @ 60:$678,786
Scenario 3: 20 YOS Retirement
Pension Target:$262,347
Projected @ 60:$805,132
DoD states members with 20+ active years can qualify for regular active-duty retirement. Confirm creditable service with your Service.Model pension start age and recurring pension income →

Why Use a Military Coast FIRE Calculator?

Military retirement can combine TSP investments with pension income that starts on a different timeline depending on the type of service and retirement. This calculator keeps those pieces separate so future military retired pay is not treated as an investment balance available today.

Military Separation and Military Retirement Are Different Scenarios

Leaving military service does not always mean military retired pay begins immediately. Modeling exit age and benefit start age separately prevents future retired pay from being applied to years when it is not actually being received.

TSP and Military Retired Pay Play Different Roles

TSP is an investment balance that can continue growing, while military retired pay is recurring income that begins according to the applicable retirement system. Keeping them separate avoids counting the same retirement resource twice.

FAQ

Frequently Asked Questions

Neutral answers to common military retired pay, TSP, and service transition Coast FIRE questions.

How do I model Coast FIRE if I leave active duty before earning military retired pay?

Enter the official retired-pay amount for that specific separation scenario, including $0 when appropriate. The calculator should continue projecting TSP and other investments without assuming a pension that the scenario does not include.

How do I compare separating before 20 years with staying to a military retirement date?

Create two scenarios using the official benefit estimate, TSP contributions and exit date for each. Compare both on the same Coast FIRE assumptions without labeling either career path as preferable.

Can my TSP keep coasting after I retire from the military at a relatively young age?

Yes for projection purposes. Set future TSP contributions to zero or to the amount you want modeled, then project the existing balance separately from military retired pay.

How should I model moving from active duty into the Guard or Reserves?

Enter active-duty separation, expected Reserve contributions, civilian contributions, official non-regular retired-pay estimate and expected benefit start age separately rather than treating the Reserve pension as immediate income.

How should continuation pay appear in my Coast FIRE calculation?

Enter only a confirmed amount and payment date for the scenario being modeled. Keep it separate from current investments until the modeled payment occurs, and verify eligibility and service obligations through current Service guidance.

What if I retire from the military but plan to work a civilian job afterward?

Enter the civilian take-home income and retirement contribution separately. Military retired pay can begin on its own timeline while the calculator models additional civilian contributions toward the same retirement-spending target.

What if military retired pay starts years after I stop serving?

Model the intervening years separately. During that period the calculator should use only the work income, cash flow and portfolio withdrawals you explicitly enter rather than applying future retired pay early.

SOURCES & METHODOLOGY

Verified Sources & Methodology

Verified August 7, 2026
•100% Client-side local execution (No servers stored)
•2026 IRS standard deductions ($16.1k Single / $32.2k MFJ)
•Rule of 55 applies to separation year (not exact birthday)
•Check employer Summary Plan Description (SPD) for options
Core vv2.4.0 • Model v1.0.0Educational estimates based on 2026 federal rules. Does not constitute tax, investment, or legal advice. Distribution availability depends on individual employer plan rules.