How to Invoice an LLC: What's Different and What's the Same

The legal name is the contract

When you invoice an LLC, you're billing a legal entity that's distinct from its owners. The owners (members) have liability protection precisely because the entity is separate. If you bill "John Smith" instead of "Smith Consulting LLC," you've technically billed John personally — which, in a dispute, could complicate enforcement against the LLC's assets and weaken John's liability shield.

So: get the legal name right. The format is business-purpose name + entity designator. Examples:

• Acme Holdings LLC
• Acme Holdings, LLC
• Acme Holdings, L.L.C.

The comma and the periods in "L.L.C." are state-by-state filing variations. Use whatever the state Secretary of State filing actually shows. For most online LLCs registered through services like LegalZoom or Northwest Registered Agent, the filing is typically "Name LLC" without a comma, but always confirm with the customer.

If you're issuing the invoice yourself as an LLC, your own legal name format matters too. Set it up correctly in your invoice template and use the same format every time. Inconsistency creates confusion in the customer's accounting system — they may end up with two vendor records for what should be the same vendor.

EIN — yours, not theirs

A common confusion: do you need the LLC's EIN on the invoice, or yours?

The seller's tax ID (yours, if you're the one billing) is what matters. Your invoice should include your own EIN (or SSN if sole proprietor without an EIN). This lets the LLC's accounting team match the invoice to your W-9 (which they collected before paying you).

The buyer's EIN doesn't typically need to appear on the invoice. The buyer reconciles the invoice to their own AP records using their internal vendor number — they know who they are. Asking the buyer for their EIN to put on your invoice is unusual and slightly off-putting; let them handle their own accounting.

The exception: if you're invoicing across borders and the buyer is providing a tax-resident certificate (e.g. for treaty-based withholding-tax reductions), their tax ID may need to appear. That's an international-tax issue handled outside the standard invoice flow.

DBAs and series LLCs

Two specific cases that catch people off-guard.

DBA (doing business as). Many LLCs operate under a public-facing trade name that differs from their legal name. "Acme Holdings LLC" might do business as "Sunshine Bakery." When you invoice, list both: "Acme Holdings LLC dba Sunshine Bakery." This matches what their accountant will see in their books and avoids the "who is Sunshine Bakery?" dispute later.

Series LLC. A series LLC has separate sub-entities ("series") inside one master legal entity. They're legal in 10+ states (Delaware, Texas, Illinois, Nevada, etc.) and increasingly used for real-estate and investment structures. Each series can own assets and incur liabilities separately. Bill the specific series, not the master. Format: "Acme Holdings LLC, Series A" or "Acme Holdings LLC — Series Restaurant Operations." Misbilling can create cross-contamination of liability between series, which defeats the whole point of the structure.

Single-member vs multi-member: same invoice

A surprising number of freelancers and contractors think single-member LLCs (SMLLCs) need to be invoiced differently. They don't.

Both single-member and multi-member LLCs are billed the same way: legal name + entity designator + standard invoice contents. The internal tax treatment differs:

• Single-member LLC, default: taxed as a sole proprietorship (Schedule C on the owner's personal return).
• Multi-member LLC, default: taxed as a partnership (Form 1065).
• Either, with election: taxed as an S-corp (Form 1120-S) or C-corp (Form 1120) if the LLC files Form 2553 or Form 8832 with the IRS.

None of this changes what goes on the invoice. The LLC's accountant handles the tax treatment internally; you just bill the entity using its legal name.

Payment terms and late fees with LLCs

LLCs are sophisticated parties. The same B2B billing rules apply: Net-30 is typical, late fees are enforceable if disclosed at the time of issue, and contracts override invoice defaults. Larger LLCs with formal AP cycles may stretch to Net-45 or Net-60; that's their leverage as bigger customers. Smaller LLCs often pay faster than required.

A few specifics:

• Late fees: Same as any B2B engagement. The clause must be on the invoice (or in the underlying contract) at issuance. Typical: "Past-due balances accrue 1.5% per month interest." Most US states enforce this as reasonable.
• Disputes: LLCs file claims against their suppliers in state court using the business name. If you've billed correctly to the legal name, enforcement is straightforward.
• Personal guarantees: New, small LLCs sometimes have member personal guarantees backstopping their accounts payable. If you required one, the invoice still goes to the LLC; the personal guarantee is invoked separately if the LLC defaults.

What about your own LLC?

If you're invoicing as an LLC (rather than as a sole proprietor under your own name), the same rules apply in reverse:

• Use your registered legal name as the seller, including the entity designator.
• Include your EIN (or SSN if you haven't gotten one yet — though most LLCs should get an EIN early).
• Open a business bank account in the LLC's name and route invoice payments there. Mixing personal and business funds undermines your liability protection ("piercing the corporate veil").

Operating as an LLC also means the buyer (your client) treats you as a B2B vendor. They'll typically ask for a W-9 before paying. They'll issue a 1099-NEC at year-end if total payments to you crossed the reporting threshold (now $2,000 for 2026 payments under the One Big Beautiful Bill Act, up from the long-standing $600). If you're an LLC with S-corp election, the 1099 still applies. None of this changes how the invoice itself is structured.

Quick checklist

• ✅ Legal name with entity designator: "Name LLC" or "Name, LLC"
• ✅ For DBAs: "Legal Name LLC dba Trade Name"
• ✅ For series LLCs: "Legal Name LLC, Series X"
• ✅ Your EIN (or SSN if sole proprietor with no EIN)
• ✅ Standard invoice contents: number, dates, line items, totals
• ✅ Payment terms (Net-30 default)
• ✅ Late-fee clause if applicable, on the invoice itself
• ✅ Bill-to: the LLC, not its members

Issueable's small business invoice template handles all the LLC-specific formatting natively. State your legal name with the entity designator, add your EIN, and the structured invoice does the rest.

If you're considering forming an LLC for your freelance practice — pros, cons, and when it makes sense — see our should freelancers form an LLC article.