> ## Documentation Index > Fetch the complete documentation index at: https://docs.tied.com/llms.txt > Use this file to discover all available pages before exploring further. # Billing and invoices > Seats, proration, payment methods, and how to read what you were charged. Your bill has two halves that behave differently. **Seats** are a subscription — predictable, charged per period. **Usage** is prepaid — resolutions, LLM cost and channel fees draw down a credit balance. This page covers the subscription half and how the two appear together. ## Seats Seats are charged per month or per year, at the per-seat price for your plan, subject to your plan's seat minimum. | Plan | Per seat / month | Minimum seats | | - | - | - | | Starter | \$99 | 2 | | Business | \$199 | 3 | | Advanced | \$299 | 4 | | Enterprise | Custom | Annual contract | **Annual billing is 20% off** the per-seat price on Starter, Business and Advanced. The annual discount applies to seats only. **Per-resolution rates do not change with billing cycle** — the orchestration fee is unaffected, and LLM cost is passed through at provider rate either way. ### Adding and removing seats Adding a seat mid-period is **prorated** for the remainder of the period. Removing one takes effect at the end of the current period; you keep the seat until then. Because included credits scale with seat count and are pooled org-wide, adding a seat also raises your monthly credit allowance. See [Credits](/pricing/credits). ## Usage Resolutions, LLM cost on Tied-supplied keys, and channel fees all draw from one prepaid credit balance. Included monthly credits are consumed first; beyond those, usage draws from purchased credits. You can top up manually or set an auto-recharge threshold so a purchase triggers before the balance reaches zero. ## Reading your invoice An invoice separates the parts that behave differently, so you can see which one moved: | Line | What it covers | | - | - | | **Subscription** | Seats for the period, with any proration shown separately. | | **Resolutions** | Orchestration fees, grouped by class. | | **LLM cost** | Token cost by model, at provider rate. Zero on BYOK. | | **Reconciliation** | The monthly true-up between our effective-dated rate table and the provider's actual invoice, allocated pro-rata by tokens. Can be a credit or a charge. | | **Channel fees** | Per channel, with carrier passthrough and Tied platform fee shown separately. | | **Voided resolutions** | Automatic credits from the 30-day reopen window and retroactive negative feedback, each with its reason attached. | Every individual resolution also has its own receipt, showing the transcript reference, the signal tier relied on, the class and its discriminator, the itemized fee and LLM cost, and a one-click dispute. See [What counts as a resolution](/pricing/resolutions). ## Payment methods and tax Self-serve plans are paid by card. Enterprise contracts can be invoiced on net terms. Tax is calculated based on your billing address and shown as a separate line. ## Enterprise contracts Enterprise billing differs in three ways: per-class resolution rates are **negotiated and never published**, resolution class definitions themselves are negotiable against what "moves money" or "regulated data" means in your industry, and long-horizon case work can be billed at milestones rather than per resolution. Once a custom definition is written into a contract, it is evaluated against the action audit trail the same mechanical way as every published discriminator. ## Next The prepaid balance, included allowances, and auto-recharge. What each tier includes, and the tool scopes behind it. This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.