Blended Retirement against the legacy system
What the 2.0% multiplier costs against 2.5%, what the TSP match and continuation pay are worth in return, why the answer depends almost entirely on whether you serve twenty years, and where the lump-sum election destroys value.
15 min read
Questions this article answers
- Is BRS better than the legacy retirement system?
- How much smaller is a BRS pension?
- Should I take the BRS lump sum at retirement?
- What happens to my retirement if I leave before 20 years?
- Is continuation pay worth the extra service commitment?
For most people reading this, the comparison is academic: your system was fixed by your date of initial entry and cannot be changed. It is worth understanding anyway, because it explains why your pension is the size it is, and because the decisions the Blended Retirement System introduces — the match, continuation pay, the lump sum — are live for anyone under it.
What was traded
The legacy system pays a 2.5% per year multiplier and nothing else. Serve twenty years, receive 50% of your retired pay base for life. Serve nineteen, receive nothing.
The Blended Retirement System pays a 2.0% per year multiplier — 40% at twenty years, a fifth less — and adds three things the legacy system does not have: automatic government contributions to the Thrift Savings Plan, matching contributions on what you contribute, and a mid-career continuation payment.
- 0.005
- The half-percent per year difference between the 2.5% and 2.0% rates.
- Retired pay base
- The average of the highest 36 months of basic pay. Identical under both systems.
- Years of service
- Creditable service. The gap widens with every year served.
Does not includeThe TSP balance, which offsets the gap and is the entire point of the trade · Continuation pay · Any investment return, which is what decides whether the offset succeeds
Given
- Retired pay base$5,900 / month
- Creditable service20 years
- Legacy rate2.5% per year
- BRS rate2.0% per year
Working
Legacy pension
5,900 × (0.025 × 20) = 5,900 × 0.50$2,950 / month
BRS pension
5,900 × (0.020 × 20) = 5,900 × 0.40$2,360 / month
Monthly gap
2,950 − 2,360$590 / month
Annual gap, before any cost-of-living adjustment
590 × 12$7,080 / year, for life
Both pensions are inflation-adjusted, so the gap grows in dollar terms every year.
The BRS pension is $590 a month smaller. Whether that is a bad trade depends entirely on what the TSP account did over the same twenty years — and on whether the member captured the full match.
This figure does not account forthe actual pay tables, any promotion difference, the TSP balance accumulated, investment returns, continuation pay, or the possibility of not reaching twenty years at all.
The case where the answer is not close
Here is the fact that reframes the whole comparison, and it applies to most people who ever wear a uniform.
That is the policy argument the change was built on, and it is worth stating plainly because most comparisons are written by and for people who did serve twenty years, and so quietly assume the case where the legacy system looks best.
Whether the match closes the gap
For a member who does reach twenty years, the question is whether the accumulated account offsets $590 a month for life. That turns on three things, and only one of them is within the member’s control.
Whether they captured the full match. A member contributing below the matched percentage received the smaller pension and did not collect the thing it was traded for. This is the worst outcome available under either system, and it is entirely avoidable.
Investment returns over twenty years, which nobody knows in advance.
Whether they left the money invested. An account cashed out at separation, or consumed by an unrepaid loan, delivers none of what the trade promised.
What goes wrong
Contributing 3% to the TSP under BRS because it feels responsible, without checking what percentage is actually matched, and accepting the smaller pension multiplier without collecting the compensation for it.
What right looks like
Contributing at least the full matched percentage in EVERY pay period, and spreading contributions evenly so the annual limit never binds before December.
WhyBRS pays 2.0% per year instead of 2.5% specifically because the government contributes to your account instead. Contributing below the match cap means accepting the reduced multiplier without taking the thing offered in exchange — the one combination that is strictly worse than either system on its own. Matching is computed per pay period with no annual true-up, so a period contributing nothing is a period matched by nothing.
Still fixableRaise the contribution rate today. Past unmatched periods cannot be recovered — the match for those periods was never funded — but every remaining pay period of a career still can be, and the earlier the correction the more periods it covers.
Continuation pay
A mid-career cash payment, offered in a window around the middle of a career, in exchange for an additional service commitment.
The multiplier that sets its size is chosen by each service and adjusted year to year, so it is not a fixed property of the system and cannot be planned around from a figure read years earlier. What is stable is the structure: a payment now, an obligation in return.
Two points decide whether it is worth taking. First, the commitment runs concurrently with anything you already carry — so for a member who already owes more time than the new commitment adds, it costs nothing at all, and the payment is free money. Second, if you would have served the period anyway, the obligation is not a real constraint and the analysis is simply whether you want the cash.
The member for whom this is a genuine decision is the one seriously considering leaving inside the commitment window. For everyone else it is closer to an administrative step than a choice.
The lump-sum election, and why it usually destroys value
At retirement, a member under the Blended Retirement System may elect to take a portion of their retired pay as a discounted lump sum, with monthly retired pay reduced until full Social Security retirement age.
There are situations where a lump sum is nonetheless the right answer — clearing high-interest debt at a rate above the implied discount, or a specific and immediate need. Those are real, and they are not the reason most people take it. The common reason is that a large number now is more legible than a small number monthly, and the arithmetic is not presented alongside the offer.
Anyone considering it should compute the present value of the payments forgone at a realistic discount rate, compare it to the lump sum offered, and be able to state the difference before signing. If that computation has not been done, the decision has not been made — it has been guessed.
What this means for a legacy-system member
Nothing about your multiplier, which is fixed. Two things nonetheless apply.
You receive no government contribution to your Thrift Savings Plan, so there is no match to capture and no reason to structure contributions around one. The account is still worth using for its costs and tax treatment, but the front-loading trap that costs Blended Retirement System members real money does not apply to you.
And the twenty-year cliff is absolute for you in a way it is not for them. A legacy member at eighteen years is holding something with no partial value, which makes the decision to stay materially different from the same decision under the newer system. That asymmetry is worth being explicit about with yourself, because it is the single largest financial fact in your career.
Related subjects
- How military retired pay is calculatedThe full computation of active-duty retired pay: which system applies to you, what the multiplier is, what the retired pay base actually averages, and the omissions that make estimates too high.
- The Thrift Savings Plan, and the match people lose without noticingHow the TSP works for service members: the agency match and the per-pay-period rule that quietly costs money, traditional against Roth, what combat-zone pay does to both, and the withdrawal rules.
Sources
The authorities themselves, not summaries of them. Every figure in this domain changes, and these are where to confirm one before you act on it.
Estimates and explanation only. Not financial, legal, tax or VA advice. Rates in this domain change annually; confirm any figure against its source before acting.