Deployment finances: the tax exclusion, the savings deposit, and what to set up first

A deployment to a designated combat zone is, financially, the most unusual period of a military career. Income rises, tax falls to nothing or nearly nothing, spending collapses, and a savings programme becomes available that pays a rate no commercial bank will match.

It is also a period of limited attention and poor connectivity, which means the decisions that exploit it have to be made before departure. This article is about which ones.

What changes about your pay

The combat zone tax exclusion. Military pay earned while serving in a designated combat zone is excluded from federal income tax. For enlisted members the exclusion is unlimited; for officers it is capped at a monthly ceiling tied to the highest enlisted basic pay plus imminent danger pay. Serving any part of a month in the zone generally qualifies the whole month.

Imminent danger or hostile fire pay, a flat monthly amount, prorated by days in the qualifying area.

Family separation allowance, where you have dependents and are involuntarily separated from them beyond a qualifying period.

Hardship duty pay at some locations, and hazardous duty pay for qualifying duties.

The exclusion is the large one. A member paying several hundred dollars a month in federal tax simply stops, for the duration.

The Roth decision, which is nearly one-sided here

Given

• Contributions from excluded pay$20,000
• Assumed annual return7%
• Years to withdrawal25
• Assumed tax rate at withdrawal22%

Working

1. Balance after 25 years

   20,000 × 1.07²⁵about $108,500

2. Growth portion

   108,500 − 20,000$88,500

   The contributions themselves come out tax-free either way. Only the growth is in question.

3. Tax on that growth if contributed to traditional

   88,500 × 0.22about $19,500

4. Tax on that growth if contributed to Roth

   Qualified withdrawal of a Roth balance$0

Roughly $19,500 in avoided tax on a single deployment's contributions — from a two-minute election.

This figure does not account forthe actual return, which is unknown; your real tax rate in retirement; changes to the rules over twenty-five years; qualified-withdrawal conditions on the Roth balance; or the annual additions limit, which is what binds for a heavy contributor while deployed.

Two adjacent points. Government matching contributions are always traditional regardless of how you contribute, so a member contributing entirely to Roth still accumulates a traditional balance. And the limit that binds while deployed is usually the annual additions limit — much higher than the ordinary elective deferral limit, and covering everything from all sources — which is what makes heavy contribution possible in the first place.

The Savings Deposit Program

Available to members deployed to designated areas, this pays a guaranteed annual rate far above any commercial deposit account, on balances up to a ceiling.

The rate is fixed by statute rather than by market conditions, which means it is extraordinary in a low-rate environment and merely good in a high-rate one. Interest is taxable even where the underlying pay was not. Deposits and interest remain available for a limited period after the deployment ends, and then the account is closed out.

The tax filing consequences

Filing deadlines are extended for members serving in a combat zone, generally by the period of service plus a further period afterwards. Interest and penalties do not accrue during that time.

Excluded pay still counts as earned income for certain purposes, including some credits — and there is an election to include otherwise-excluded combat pay when computing the Earned Income Tax Credit, which for a lower-income family with children can increase the credit substantially. This is a genuine and frequently missed benefit, and it points the opposite way from the usual instinct that excluding more income is always better.

Tax-exempt contributions are tracked separately in your retirement account for the rest of its life. Keep the records showing which contributions were tax-exempt; the plan tracks it, but a rollover years later is where that tracking is most likely to be disrupted.

What to set up before you go

The financial half of a pre-deployment checklist, in rough priority order:

The Roth election, if you will be contributing from excluded pay. Two minutes, and the highest-value item here.

Savings deposit enrolment, or at least knowing how to do it on arrival.

Powers of attorney — durable, and specific ones for the institutions that actually matter, confirmed with each institution beforehand. That subject has its own article and it is the item most likely to fail at the worst moment.

Beneficiary designations on life insurance, the retirement account, and the emergency data form, checked rather than assumed.

Automatic payments for everything that must continue, and a plan for anything that requires a human decision.

A conversation about spending. Deployment income is temporary and the household’s standard of living can quietly rise to meet it. The return is when that becomes visible, and it is easier to agree beforehand what the money is for than to unwind an adjusted lifestyle afterwards.

The protections you are owed

The Servicemembers Civil Relief Act caps interest at 6% on obligations incurred before entering service or being called to active duty, on written request with a copy of your orders. It also provides protections around lease termination, eviction and default judgments.

The cap is not automatic. It requires you to invoke it, in writing, and it applies to pre-service debt rather than to anything taken on afterwards. Members frequently either do not know it exists or assume it covers debt it does not.