# Estimating Costs Boost for Daz uses fractional billing so you are only paying for what you use - right to the very minute. Here’s how your costs are calculated for a session (all prices here are in US Dollars): {% hint style="info" %} The key inputs into your final charges for a session are: * Session Rate in cents/minute = (Hourly rate of the selected machine, *in cents*)/ 60 **\[A]** * Total Duration of your session (in minutes) \[**B]** {% endhint %} You will be charged = **\[A]** \* **\[B]** , which is \[Session Rate (in cents) \* Duration of your session in (minutes)] So, for example: If you selected an NVIDIA RTX 4000 machine currently priced at $1.40/hour and you used it for 20 minutes, here’s how your total charges will be calculated: Session Rate (in cents/minute): 140/60 = 2.3333333 cents/minute **\[A]** Total Duration of session = 20 mins **\[B]** Your total charge for a 20 min session on an RTX 4000 machine on Boost for Daz = **\[A]** \* **\[B]** \=> \[$0.023333333 /minute] \* \[20 Minutes] => $0.466666666, but it will round up to $0.47 So, a 20 min session on an RTX 4000 at a $1.40 hour rate would cost you 47 cents. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.boostfordaz.com/using-boost-for-daz/pricing-and-billing/estimating-costs.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.