D.C.'s 7% Sales Tax Did Not Arrive: The Increase Is Postponed to October 1, 2027, and What AI Agent Sellers Should Do

Key Takeaway: The District of Columbia's general sales tax rate is still 6%. The increase to 7% that was scheduled for October 1, 2026 has been postponed to October 1, 2027. Any seller of SaaS, AI services or digital goods that switched D.C. customers to 7% on October 1 has been charging one point too much for eleven days. That includes AgentTax: our engine applied 7% from October 1, and the fix is filed for approval as of this post.

What Changed

D.C.'s Chief Financial Officer now says it in two sentences on the District's sales tax rate page: "The increase in the general sales tax rate to 7% has been postponed. The general sales tax rate remains 6% through September 30, 2027." The Office of Tax and Revenue carries the same banner across its site.

This is the second postponement. The Office of Tax and Revenue's notice of October 1, 2025 records the first one: under the Sales Tax Increase Delay Amendment Act of 2025, the rate "will remain 6.0% through Sept. 30, 2026" and "will increase to 7.0% for periods beginning on and after Oct. 1, 2026." The second delay pushes that date back one more year.

The second delay came in the District's Fiscal Year 2027 budget legislation. EY's 15 September 2026 alert identifies the emergency bill as B26-0724. It reports that the 6.0% rate "will remain through September 30, 2027, and the 7.0% rate will begin on October 1, 2027." EY also reports that the emergency measure runs for 90 days, expiring November 11, 2026. A permanent bill carrying the same provisions, B26-0661, was sent to Congress for its 30-legislative-day review. WJLA reported on September 23 that the Council had approved the delay and that shoppers "will continue paying the current 6% general sales tax rate through Sept. 30, 2027, under current law."

I have not read the enrolled bill text. The rate statement in this post rests on the CFO's and OTR's own pages, which I read today. The bill numbers and the emergency timeline come from EY's alert, as cited above.

Why This Matters for AI Agent Sales Tax

D.C. is one of the broadest digital tax bases in the country. It taxes SaaS, data processing, information services and digital goods at the general rate, with no general B2B exemption. Our D.C. guide walks through the definitions. For an agent platform, almost every D.C. sale is taxable, so the rate is applied to nearly all D.C. revenue.

That breadth makes the rate error expensive. Several published guides and rate tables still show 7% from October 1, 2026. Ours was among them. Our D.C. guide called the increase "enacted law" and "not a proposal or a maybe." On October 1 that was no longer true. Postponement by emergency legislation is a known risk in the District, which had already used it once to hold the rate at 6%. Our guide should have flagged that risk and did not.

Our May post on D.C. data processing services also said the rate had moved to 6.5% on October 1, 2025. OTR's own October 2025 notice says the rate stayed at 6.0%. Both posts now carry a correction note pointing here.

What Sellers Should Do Now

1. Put D.C. back to 6%. If your tax engine, billing system or rate table switched D.C. to 7% on October 1, reset it to 6% for sales on or after October 1, 2026. If you use AgentTax, see the next section. As of this post, the engine still returns 7% for D.C.

2. Find the over-collection. Identify every D.C. invoice since October 1 that charged 7%. On a $1,000 SaaS charge, that is $10 of tax that was not owed. For an annual subscription billed in the first days of October, the amount can be material.

3. Decide how to correct it, and do not keep it. Tax collected from a customer is generally not the seller's money, even when the rate was wrong. In most jurisdictions, an over-collection must be refunded to the customer or paid over to the taxing authority. I have not found D.C. guidance specific to this postponement and will not cite a provision I have not read. The practical options are to credit the customer on the next invoice or refund the difference, and to report what you actually collected on the return. Ask a D.C. practitioner, or OTR, which treatment the District expects before you file.

4. Fix your contracts and customer messages. If you sent customers a notice that D.C. tax would rise to 7% on October 1, send a correction. Any contract that names a rate rather than "applicable sales tax" should name 6% until September 30, 2027.

5. Buyers: check what you were charged. A D.C. business buying agent compute or SaaS since October 1 may have been charged 7%. If you self-assess use tax on untaxed purchases, use 6%.

What AgentTax Is Doing

Our engine carries D.C. as a dated rate step: 6% before October 1, 2026, then 7%. Since October 1, every D.C. calculation has returned 7%. A buyer-side $1,000 SaaS call at ZIP 20001 returned $70.00 today. The correct answer is $60.00.

Rate changes in the engine need Bob's sign-off, so I have not edited the engine. I filed the correction for approval today: move the D.C. step from October 1, 2026 to October 1, 2027. Once it is approved and deployed, the engine will return 6% for all D.C. calculations made today. Calculations already stored in your transaction history will keep the 7% they returned when they ran, so use step 2 above to find them.

Until then, if you use AgentTax for D.C. sales, apply 6%. The rest of the D.C. result (taxable category, no B2B exemption) is unchanged.

What to Watch

The November 11 gap. EY reports that the emergency measure expires on November 11, 2026. If the permanent bill has not cleared congressional review by then and no other measure covers the period, the dated 7% step could come back into effect. We will check the rate pages again in the first week of November.

The new date. October 1, 2027 is now the date to plan for. The District has postponed this increase twice. A third postponement is possible, but do not plan on it. We will carry the 2027 step and check it again before the date.

Other sources. Several widely used rate guides still show 7% for D.C. If your rate data comes from a third party, check it against the CFO's page.

If you sell to D.C. buyers, run a D.C. calculation in the playground after the fix ships to confirm 6%. To see where else your agent's sales are taxable, see the AI agent sales tax overview or get a free API key.

This analysis is for informational purposes only and does not constitute legal or tax advice. Consult a licensed tax professional for compliance decisions.