Scope is the biggest lever. Automating one document workflow costs a fraction of building a system that spans quoting, operations, and reporting. The narrower the problem, the faster and cheaper it ships, which is why a good consultant pushes you to start with one high-value workflow instead of everything at once.
Data readiness comes next. If your data is clean and reachable, a build moves quickly. If it lives in PDFs, scattered spreadsheets, and a legacy system with no clean export, the project spends real time on extraction and cleanup before any AI work starts, and that time shows up in the price.
Integrations and security round it out. Every system the solution must connect to, like an ERP, a CRM, or an accounting tool, adds work. Strict requirements around compliance, access control, and auditability add more. These are worth paying for when you handle regulated or financial data, but they do raise the number, so name them up front.