How to Evaluate a Software Development Estimate (Even If You're Not Technical)

You’ve received two estimates for your project. One says $8,000, the other says $40,000. Both developers seemed competent. How do you know which one is right?

The Problem with Black-Box Estimates

Most estimates you’ll receive are just a number. Maybe a timeline. But you have no way to understand why that number is what it is.

This is a problem because:

• You can’t compare estimates meaningfully
• You can’t tell if the developer understood your requirements
• You have no way to adjust scope to fit your budget

What a Good Estimate Should Include

A transparent estimate breaks down the work into individual tasks. Each task should have:

1. A clear description — What exactly is being built
2. A time estimate — How long it will take
3. Dependencies — What needs to happen before this task
4. Assumptions — What the developer is assuming about your requirements

Red Flags in Estimates

Watch out for:

• Round numbers with no breakdown (“This will be $15,000”)
• Vague timelines (“2-6 months”)
• No questions asked before estimating
• Pressure to decide quickly

Questions to Ask

Before accepting any estimate, ask:

• “Can you break this down by feature?”
• “What’s included in testing and bug fixes?”
• “What happens if we need to change something mid-project?”
• “What’s your process for keeping me updated?”

Special Considerations for AI Projects

If your project involves AI (like LLMs, RAG, or AI Agents), the estimate should also account for:

• Data Preparation: Cleaning and structuring your data for the AI.
• Model Tuning: Adjusting the AI to work specifically for your use case.
• Evaluation: Testing the AI’s answers for quality and accuracy.
• Token Costs: Estimating how much you’re likely to pay for the AI’s “brainpower”.

The right developer will appreciate these questions. They show you’re serious about the project and want a real partnership.