> ## Documentation Index > Fetch the complete documentation index at: https://docs.inworld.ai/llms.txt > Use this file to discover all available pages before exploring further. # Billing Choose a plan and get credits each month to use across [TTS](/tts/tts), [STT](/stt/overview), [LLM Router](/router/introduction), and [Realtime API (Speech to Speech)](/realtime/overview). Higher tiers unlock features, volume discounts, increased limits and more. View the pricing page. View and manage your plan. ## Plans | | **On-Demand** | **Creator** | **Builder** | **Developer** | **Growth** | **Enterprise** | | ------------ | :------------------------: | :---------------------------------: | :------------------------------: | :---------------------: | :------------------------------: | :-------------------------------: | | **Price** | Free | \$25/mo | \$100/mo | \$300/mo | \$1,500/mo | Custom | | **Best for** | Evaluation and prototyping | Content creation and small projects | Growing projects and small teams | Production applications | Large deployments and compliance | Custom pricing, limits, and terms | Please see our [**Pricing Page**](https://inworld.ai/pricing) for more details about each plan, including model pricing, available features, and rate limits. Paid plans are available monthly or annually. Annual subscriptions are billed once per year. Paid plans include credits equal to the monthly plan price each billing cycle. Unused credits on all paid plans (Creator and above) roll over for up to 3 months with an active subscription. Your credit balance is displayed at the top of the [Billing page](https://platform.inworld.ai/billing). Credits are consumed by API and Playground usage across all products (TTS, STT, LLM Router, Realtime). You can upgrade your subscription at any time, and any unused credits from your previous plan will be credited to the new one. Any outstanding unpaid usage at the time of upgrade will be immediately charged. If you need more credits than provided in your selected plan, you can: * **Add credits** — Click **Add credits** to purchase more. The minimum purchase is \$10. You will be redirected to a secure checkout page, and credits are applied immediately upon payment. * **Auto-reload** — Enable auto-reload to automatically purchase credits when your balance falls below a threshold you set. Configure the reload amount and threshold from the Billing page. Some premium LLM models require a credit card on file before they can be used, even if you have an existing credit balance. To unlock these models, either make a credit purchase or upgrade to a paid plan. You can add a payment method from the [Billing page](https://platform.inworld.ai/billing). Enterprise accounts are billed per their agreement. Credit purchases are not available for enterprise plans. ## Managing billing information From the [Billing page](https://platform.inworld.ai/billing), click **Manage Plan** next to your plan name, then select **View invoices & manage billing information** to: * **Update billing details** — Change the name, email, address, and phone number on your account. * **Update payment method** — Add, remove, or change your payment method. At least one payment method must remain on file. * **Add tax IDs** — Add or manage tax identification numbers for your account. * **View invoices** — Review and download all prior invoices. Full invoice history is also available from the **Billing History** tab on the Billing page. Enterprise accounts have billing managed per their agreement. [Contact your account team](https://inworld.ai/contact-sales) for billing changes. ## Cancellation To cancel your subscription, go to the [Billing page](https://platform.inworld.ai/billing), click **Manage Plan**, and cancel your plan from there. ## Payment failures If a payment fails for your subscription, we'll retry the charge over a 7-day period. If all retries are exhausted, your account is downgraded to the On-Demand tier and API usage is disabled. To restore access, upgrade your plan from the [Billing page](https://platform.inworld.ai/billing). ## TTS On-Demand accounts include up to 70 minutes of TTS for free. Text-to-Speech usage is billed per million characters synthesized across both the TTS Playground and the API. Get discounted rates by signing up for higher tiers. See [**Pricing Page**](https://inworld.ai/pricing) for the latest pricing. Inworld TTS is also available for on-prem deployment. [Contact sales](https://inworld.ai/contact-sales) for on-prem pricing. ### TTS features by plan Available features vary by subscription tier, including: * Number of custom voices * Playground character limits * Workspace creation and sharing * Access to professional voice cloning * HIPAA & BAA See the [**Pricing Page**](https://inworld.ai/pricing) for a full breakdown of features by plan. ### TTS limits by plan Your subscription plan determines how many requests can be processed simultaneously. | | On-Demand | Creator | Builder | Developer | Growth | Enterprise | | -------------------------------- | :-------: | :-----: | :-----: | :-------: | :----: | :--------: | | Concurrent generations | 5 | 10 | 50 | 150 | 500 | Custom | | WebSocket connections | 50 | 100 | 500 | 1,500 | 5,000 | Custom | | Voice design API (requests/min) | 2 | 3 | 5 | 10 | 20 | Custom | | Voice cloning API (requests/min) | 2 | 3 | 5 | 10 | 20 | Custom | Concurrency limits apply per account and are shared across API keys. Requests above these guaranteed limits are best-effort based on available capacity. For conversational use cases like voice agents, most applications need far fewer concurrent generations than expected. Because speech is generated much faster than it is spoken, a single generation slot can serve multiple conversations. See [Concurrency Limits](/resources/concurrency-limits) for more information. To unlock higher limits, upgrade your plan or [reach out to our team](https://inworld.ai/contact-sales). ## STT On-Demand accounts include up to 400 minutes of STT for free. Speech-to-Text usage is billed based on audio duration. Get discounted rates by signing up for higher tiers. See the [**Pricing Page**](https://inworld.ai/pricing) for the latest pricing. ### STT features and limits by plan Your subscription plan determines how many requests can be processed simultaneously. | | **On-Demand** | **Creator** | **Builder** | **Developer** | **Growth** | **Enterprise** | | --------------------- | :-----------: | :---------: | :---------: | :-----------: | :--------: | :------------: | | Streaming concurrency | 10 | 20 | 100 | 300 | 1,000 | Custom | Concurrency limits apply per account and are shared across API keys. Requests above these guaranteed limits are best-effort based on available capacity. Available features also vary by subscription tier, including: * HIPAA & BAA * Zero data retention * On-prem deployment See the [**Pricing Page**](https://inworld.ai/pricing) for a full breakdown of features by plan. ## Realtime Router When you route LLM requests through Inworld, you pay the provider's listed cost with no markup. | Provider | Pricing | | ---------------- | ------------------- | | LLMs via Inworld | At cost (no markup) | | LLMs via BYOK | Cost + 4% | See the [Pricing](https://inworld.ai/pricing) page for a full breakdown of LLM model rates across all supported providers. ### Router features and limits by plan Your subscription plan determines your rate limits. | | **On-Demand** | **Creator** | **Builder** | **Developer** | **Growth** | **Enterprise** | | ------------------------------- | :--------------: | :---------: | :---------: | :-----------: | :--------: | :------------: | | Concurrent generations | Free: 2, Paid: 5 | 10 | 50 | 150 | 500 | Custom | | Chat completions / Messages RPS | 10 | 10 | 15 | 30 | 50 | Custom | Limits apply per account and are shared across API keys. Requests above these guaranteed limits are best-effort based on available capacity. Available features also vary by subscription tier, including: * Premium model access * HIPAA & BAA * Zero data retention See the [**Pricing Page**](https://inworld.ai/pricing) for a full breakdown of features and limits by plan. ## Realtime API The Realtime API combines TTS, STT, and LLM capabilities into a single session. Usage is billed based on the underlying TTS, STT, and LLM usage at your tier's rates. See the [**Pricing Page**](https://inworld.ai/pricing) for the latest pricing. ### Realtime API features and limits by plan Your subscription plan determines how many requests can be processed simultaneously. | | **On-Demand** | **Creator** | **Builder** | **Developer** | **Growth** | **Enterprise** | | ------------------- | :-----------: | :---------: | :---------: | :-----------: | :--------: | :------------: | | Concurrent sessions | 10 | 20 | 100 | 300 | 1,000 | Custom | Concurrency limits apply per account and are shared across API keys. Requests above these guaranteed limits are best-effort based on available capacity. Available features also vary by subscription tier, including: * HIPAA & BAA * Zero data retention * On-prem deployment See the [**Pricing Page**](https://inworld.ai/pricing) for a full breakdown of features by plan.