The SCRA 6% Interest Cap on IRS Debt: Who Gets It and How to Claim It

Most servicemembers know the Servicemembers Civil Relief Act caps interest on pre-service debts at 6%. Most assume that means credit cards and car loans. It also means the IRS. If you owed federal tax before you went on active duty, you can ask the IRS to cap the interest at 6% for as long as you serve.

The statute

50 U.S.C. 3937(a)(1) says an obligation or liability bearing interest above 6% per year that is incurred by a servicemember, or by the servicemember and spouse jointly, before the servicemember enters military service shall not bear interest above 6% during the period of military service (and one year after for mortgages). Section 3937(a)(2) says interest above 6% that would otherwise be incurred is forgiven, not just postponed.

The IRS applies this to tax debt. IRM 5.1.7.13.2 says that if a deferment request under the SCRA is denied, no more than 6% interest (unless the applicable rate is lower) per year will be charged while the taxpayer is in active military service, citing 50 U.S.C. 3937. IRS Publication 3 for 2025 returns says the same thing, and adds that the reduced rate "applies regardless of whether the military service materially affects your ability to pay."

Three conditions

1. The liability was incurred before you entered active duty. IRM 5.1.7.13.2 states this directly. Tax on income earned after you entered service does not qualify.
2. You are in military service. The cap applies during the period of military service, as defined in 50 U.S.C. 3911. For Guard members, that includes certain federally funded calls to active service of more than 30 consecutive days under 32 U.S.C. 502(f).
3. You give the IRS your orders on time. Section 3937(b)(1) requires written notice and a copy of the orders calling you to service (and any extension orders) no later than 180 days after your release from service. Publication 3 and the IRM repeat the 180-day requirement.

The cap does not ask whether you can afford to pay. It asks when the debt arose and whether you sent your orders in time.

When the cap actually saves money

The IRS underpayment rate for individuals is the federal short-term rate plus 3 percentage points, reset every quarter. For the quarter beginning October 1, 2026, the IRS announced a rate of 7% per year, compounded daily. At 7%, the cap shaves off one point. When rates are at or below 6%, the cap does nothing that quarter.

That might sound small. On a pre-service balance carried through a multi-year enlistment, it adds up. And section 3937(a)(2) says the excess is forgiven, not deferred.

How to claim it

1. Write to the IRS. Send a letter to the IRS office handling your account, or to the address on your most recent notice. State that you are a servicemember, that the liability for the listed tax years was incurred before you entered active duty, and that you request the interest rate limitation of 50 U.S.C. 3937.
2. Attach your orders. Include the orders calling you to active duty and any extension orders. Section 3937(b)(1)(A)(ii) also allows "any other appropriate indicator of military service, including a certified letter from a commanding officer."
3. List the years. Identify which tax years are pre-service. A year that straddles your entry date needs care, because only the pre-service liability qualifies.
4. Keep proof of mailing. The 180-day deadline is statutory.

Inside the IRS, IRM 5.1.7.13.2 says the adjustment is made with a transaction code 340 reflecting the military interest percentage. If you receive Letter 3079 denying a deferment, the IRM says the letter should include an optional sentence telling you about the reduced rate when you have provided your orders in time.

Deferral versus the cap

	SCRA deferral (50 U.S.C. 4000)	6% cap (50 U.S.C. 3937)
What it does	Stops collection; no interest or penalty during deferment	Limits interest to 6% during service
Ability to pay test	Yes, must be materially affected	No
Which debts	Income tax due before or during service	Liability incurred before entering service
IRS initial-period limit	Yes, per IRM 5.1.7.13	Not stated in the IRM for the cap
Deadline	Request during service or within 180 days after	Orders no later than 180 days after release

If you qualify for deferral, that is usually the better outcome, because no interest at all accrues on the deferred amount. The cap is the fallback. Read SCRA tax deferral to see whether you qualify.

What the cap does not cover

• Penalties. The cap is about interest. Failure-to-file and failure-to-pay penalties are separate. See penalty relief and military service.
• Post-service periods. Once you leave military service, the normal rate applies again (mortgages get an extra year under the statute, but tax debt is not a mortgage).
• Collection. The cap does not stop levies or liens. If you need collection stopped, look at deferral, an installment agreement, or hardship status.

A simple illustration

Take a hypothetical reservist who owes a $10,000 balance from civilian years and is then called to active duty for a year while the IRS rate sits at 7%. Ignoring daily compounding to keep the arithmetic simple, a 7% rate costs about $700 for the year. A 6% cap costs about $600. The difference, roughly $100, is forgiven under section 3937(a)(2). Bigger balances and longer service make the number bigger. When the IRS rate drops to 6% or lower, the difference for that quarter is zero.

Common mistakes

• Waiting until after the 180-day window closes. Send the orders while you are serving, or right after release.
• Asking for the cap on taxes from income earned during service. That tax was not incurred before entry.
• Forgetting extension orders. If your service was extended, send those orders too, as section 3937(b)(1)(A)(i) contemplates.
• Assuming the IRS applied it automatically. Check your account transcript for the interest adjustment.

Reservists and Guard members

Reservists often have the clearest case. A reservist who owed tax from civilian income and then gets called up has a pre-service liability. The day the orders take effect, the cap can apply. Send the orders promptly, and send any extension orders too.

Six percent is not a cure for tax debt. But it is money the law says you should not have to pay. Claim it.