Sole Proprietor vs. Standard: Choose Your 10DLC Path

When initiating the A2P 10DLC registration process via The Campaign Registry (TCR) or your messaging provider, the very first fork in the road is determining your Brand Identity type. You must choose between registering as a Sole Proprietor or a Standard Brand. This is not a choice based on preference, marketing volume, or budget. It is a strict legal and technical classification dictated by how your business is incorporated and taxed in the United States. Misunderstanding this distinction is a leading cause of initial registration failures, wasted vetting fees, and agonizing support tickets.

The rules established by the cellular carriers (AT&T, T-Mobile, Verizon) and enforced by the TCR are designed to assign a verifiable identity to every single text message traversing the network. Because different types of entities represent different levels of spam risk, the carriers have built two completely separate ecosystems with distinct rules, costs, and throughput limitations. Let's break down the exact requirements, limitations, and strategic implications of both the Sole Proprietor and Standard Brand registration paths.

The Sole Proprietor Path: For the Individual

The Sole Proprietor registration framework was introduced specifically for hobbyists, freelancers, local independent contractors, and ultra-small businesses that operate without formal corporate structure. The absolute defining characteristic of this path is that the sender does not possess an Employer Identification Number (EIN). If your business has an EIN, a Tax ID number, or is a registered LLC, C-Corp, or S-Corp, you are strictly prohibited from using the Sole Proprietor path.

Because Sole Proprietors cannot be verified against IRS corporate databases, the TCR utilizes a different verification mechanism. Instead of secondary vetting via Aegis or WMC Global, Sole Proprietor registrations require a One-Time Password (OTP) verification. The individual must provide a valid mobile phone number. The TCR will text a code to that handset, and the user must input it to verify their identity.

However, this ease of registration comes with severe penalties in deliverability. Because carriers view unverified individuals as the highest risk category for spam and phishing, Sole Proprietor campaigns are placed in the lowest possible throughput tier. Across most carriers, including T-Mobile, a Sole Proprietor campaign is hard-capped at 1,000 to 3,000 total messages per day. On AT&T, your velocity is throttled to around 15 Transactions Per Minute (TPM). Furthermore, Sole Proprietors are typically restricted to having only one registered Campaign ID and a maximum of 1 to 5 phone numbers associated with that campaign. It is impossible to scale an enterprise messaging operation on a Sole Proprietor framework.

The Standard Brand Path: Scalability and Trust

The Standard Brand path is the default ecosystem for any legally registered business entity possessing an EIN (or equivalent international corporate tax ID). This path is designed for scale. When you register a Standard Brand, you are required to submit your exact legal business name, physical address, and EIN.

This data is then subjected to "Secondary Vetting" by third-party agencies. They cross-reference your submission against the IRS database and state incorporation records. If your data matches flawlessly, your brand is assigned a "Trust Score" ranging from 0 to 100. This score is the golden key to 10DLC. A high Trust Score unlocks Tier 1 throughput. On T-Mobile, this can grant you an allowance of 200,000 messages per day. On AT&T, it can unlock speeds up to 60 Transactions Per Second (TPS).

Standard Brands can also register multiple different Campaign IDs (e.g., one for Marketing, one for 2FA, one for Customer Care) under the same Brand ID. They can attach dozens—or even hundreds—of phone numbers to those campaigns to handle massive traffic volume. The tradeoff is the cost: you must pay the one-time secondary vetting fee, and monthly campaign fees are higher (typically $10 to $15 per campaign, depending on the use case).

The Migration Trap

A frequent mistake made by growing startups is registering as a Sole Proprietor to save money, with the intention of "upgrading" to a Standard Brand once their volume increases. There is no upgrade button in the TCR.

If you outgrow the 1,000 message-per-day limit of your Sole Proprietor campaign, or if you incorporate your business and obtain an EIN, you must essentially abandon your old registration. You will have to start from scratch: register a new Standard Brand, pay the vetting fees, create a new Campaign Use Case, submit new sample messages for manual DCA review, and finally, migrate your existing sending numbers over to the new campaign. This migration process can cause days or weeks of messaging downtime.

Therefore, strategic foresight is critical. If your business possesses an EIN, you must register as a Standard Brand from day one. If you are a true Sole Proprietor but anticipate scaling your messaging volume beyond a few hundred texts a day, it is highly recommended that you legally incorporate, obtain an EIN, and proceed down the Standard Brand path to ensure your communication channels are never throttled by carrier firewalls.