Forming an LLC changes a few things about how your invoices should look, mostly small, but they matter for liability protection and taxes.
Use your LLC's legal name, consistently
Every invoice should show your business's full legal name exactly as registered, "Rivergate Design Co., LLC," not just "Rivergate Design" or your personal name. This matters more than it seems: consistently invoicing under your personal name instead of the LLC's name can undermine the liability protection the LLC exists to provide.
What to include beyond a standard invoice
Full legal business name, including "LLC" or "L.L.C." per your state's requirement.
Business address, your registered agent address or business address, not a personal home address if you'd rather keep that private.
EIN (optional but common), some clients, especially larger companies, will request this for their own 1099 reporting. You're not required to put it on the invoice itself, but having it ready speeds things up.
Payment instructions to a business account, payments should go to your LLC's business bank account, not a personal one, to keep the liability separation clean (called "piercing the corporate veil" if you don't).
Multi-member LLCs and LLCs taxed as an S-corp may have additional invoicing or payroll considerations, this guide covers the general case for a single-member LLC. When in doubt, a quick check with an accountant is worth it.
Sales tax
Whether you charge sales tax depends on your state and what you're selling (physical goods are taxed far more often than services). If you're required to collect it, your invoice needs a clear tax line, Ledgerline's generator has a tax rate field built in for exactly this.
Once you've formed the LLC, one more thing worth checking is whether you need a registered agent, most states require one, and many freelancers can serve as their own.
Build an LLC-ready invoice
The Ledgerline invoice generator has a full business address field, tax rate, and notes section, everything you need to invoice properly as an LLC.