You sign in, you get a sponsor, you get a room, and somewhere in the blur of in-processing a series of financial decisions get made on your behalf. They are reasonable defaults. Some of them are quietly expensive, and the cost compounds for as long as you stay in.
Nobody is hiding them from you. They are just never presented as decisions.
1. Your life insurance is on, and your beneficiary might be nobody
You are automatically enrolled in Servicemembers' Group Life Insurance at the maximum $500,000. It costs 5 cents per $1,000 of coverage per month, so $25 for the full amount, plus $1 for Traumatic Injury Protection. Total: $26 a month. That rate dropped from 6 cents per $1,000 on July 1, 2025, which is why you will still see $31 printed everywhere.
The coverage is the easy part. The default that hurts is the beneficiary. Log into the SGLI Online Enrollment System and look at who is actually listed. If it says "by law," the payout goes down a statutory order of precedence, not to the person you have in mind. A twenty-year-old with a serious partner and no designation is making an expensive assumption.
Two minutes in SOES. Do it before you do anything else on this list.
2. Your TSP is probably not capturing the full match
Under the Blended Retirement System the government puts in 1% of your base pay whether you contribute or not, and matches your own contributions up to another 4%. Contribute 5% of base pay and you collect the full 5% from the government. Contribute 3% and you leave part of the match on the table permanently. There is no makeup provision.
Open myPay and read your actual contribution percentage rather than assuming. Then think about Roth versus traditional. As a junior enlisted member you are in the lowest tax bracket you will ever occupy, which is the textbook argument for Roth: pay the tax now at a rate you will never see again. Our TSP Calculator models both, and Military Roth TSP covers why deployments make it even more lopsided.
3. Your state of legal residence was assigned, not chosen
Your home of record is the place you enlisted from. It is fixed, it drives travel entitlements, and it is not the same thing as your state of legal residence. Legal residence, also called domicile, is what determines whether a state taxes your military pay. It shows up on your LES.
Most new service members carry their enlistment state forward by inertia. If that state taxes military income and you are stationed somewhere that does not, you may be paying tax you have no obligation to pay. Changing it takes a DD Form 2058 and, more importantly, evidence: driver's license, vehicle registration, voter registration, where you actually return between assignments. A form with no supporting pattern of life is a form a state auditor will ignore.
If you are married, the rules changed in 2023 and your household may now choose among three states, including the duty station itself. See Military Spouse State Taxes.
4. You are budgeting on money you do not receive
Recruiters and pay charts talk about total compensation. Junior single service members usually live in the barracks, which means government quarters and no BAH. Build your budget on base pay and BAS, not on a housing allowance you will not see until you move out or get married.
The mirror image is also true, and it hits people the other way. BAH is set by location, so a move can cut your housing allowance sharply even as your rank goes up. Run both locations through the Compensation Calculator before you sign a lease anywhere, and read The Military COLA Trap for how that plays out on an overseas move.
5. The car loan outside the gate is protected by neither law
This is the one that ends careers' worth of savings before they start.
Service members have two federal protections against predatory credit, and a car you buy after joining falls into the gap between them.
| SCRA | Military Lending Act | |
|---|---|---|
| Covers debt | Incurred before active duty | Incurred during active duty |
| The cap | 6% interest, excess forgiven | 36% Military Annual Percentage Rate |
| How it applies | You invoke it in writing | Automatically, lenders check the DoD database |
| Your new truck loan | Not covered, you bought it after joining | Generally excluded, purchase-money loans secured by the vehicle |
Read the bottom row again. The 36% MAPR cap generally does not reach a loan used to buy the very vehicle securing it. So the dealership two miles from the gate, quoting you a rate on a car you cannot afford, is operating in the space where neither protection applies. They know this. It is why they are there.
The First Ninety Days, In Order
Designate your SGLI beneficiary in SOES. Check your TSP contribution rate in myPay and set it to at least 5%. Enroll dependents in DEERS if you have them, because nothing downstream works until DEERS is right. Decide your state of legal residence deliberately rather than by default. Then, and only then, think about a car.
If you carried debt in with you from before you enlisted, write the SCRA letter this week. Interest above 6% is forgiven, not deferred, and it is retroactive to your first day of active duty. Your legal assistance office will draft it for free. Details in The SCRA, Actually Explained.
Frequently Asked Questions
Is SGLI $31 a month or $26?
$26 for the maximum $500,000, made up of $25 in basic premium and $1 for TSGLI. The basic rate fell from 6 cents to 5 cents per $1,000 on July 1, 2025. Anything still saying $31 predates that change.
Should I go Roth or traditional TSP?
At junior enlisted pay you are in the lowest bracket of your life, which favors Roth. Model it rather than guessing, and note that contributions made in a combat zone are a special case.
Can I change my home of record?
Generally no. You change your state of legal residence instead, with a DD Form 2058 and supporting evidence. They are different records serving different purposes.
What does a PCS actually pay me?
Entitlements depend on your orders, dependent status, and whether you move yourself. Run your specific move through the PCS Calculator rather than relying on what someone in the smoke pit told you.
General information, not financial or legal advice. Your installation's financial readiness office and legal assistance office are free and are staffed by people who do this every day. Related: TSP Calculator, SCRA Explained, and PCS Financial Planning.