How to Bid Software Projects: A Practical Guide

Bidding on software projects is the process of estimating the time, cost, and effort required to build a piece of software, then presenting that estimate to a client in a way that wins the work while still protecting your margins. This guide walks you through the entire bidding process, from reading the request for proposal (RFP) to submitting a final bid, with practical steps you can apply immediately. Before you start, you need a clear understanding of your team’s hourly rate, a template for your proposal, and a method for breaking down work into tasks.

What You’ll Need

• A copy of the client’s RFP or project brief
• Your team’s hourly rates or day rates
• A spreadsheet or project management tool for task breakdown
• A proposal template (Word, Google Docs, or PDF)
• Access to historical data from past projects (if available)

Step-by-Step

1. Read the RFP thoroughly, twice. Highlight every deliverable, deadline, and acceptance criterion. Note anything ambiguous—you’ll need to ask clarifying questions. Pay special attention to the scope boundary: what is explicitly included and what is excluded.
2. Ask clarifying questions. Before estimating, send a list of questions to the client. Common ones: “What is the expected user volume?”, “Do you have existing design assets?”, “Who provides the content?”, “What are the acceptance criteria for each milestone?” This not only saves you from wrong assumptions but also shows you’re thorough.
3. Break down the project into small tasks. Use a work breakdown structure (WBS). For each feature, list the sub-tasks: database design, API endpoints, frontend components, testing, documentation. Aim for tasks that take no more than 2-3 days each—this makes estimation more accurate.
4. Estimate each task in hours. For each task, write down the number of hours it will take a competent developer to complete. Be realistic: include time for code reviews, fixing bugs, and integration. If you’re unsure, add a buffer of 20-30% to that task.
5. Add non-development time. Don’t forget project management, communication, meetings, QA, deployment, and post-launch support. These often eat up 15-20% of the total hours. Add them as separate line items in your estimate.
6. Calculate your total cost. Multiply the total hours by your blended hourly rate (or sum of different roles’ rates). Add any external costs: third-party licenses, hosting, hardware, or subcontractor fees. This is your base cost.
7. Add your profit margin. Decide on a markup that covers your overhead and profit—typically 15-30% for software projects. Add this to the base cost to get your bid price. Be transparent if the client asks for a breakdown, but you don’t have to show your margin.
8. Choose a pricing model. Fixed-price (you name a single price for the whole project) or time-and-materials (you bill by the hour). Fixed-price is riskier for you, so add a bigger buffer. T&M is safer but some clients dislike the uncertainty. For a small, well-defined project, fixed-price might win; for a large, vague one, push for T&M.
9. Write the proposal. Structure it as: executive summary, your understanding of the project, proposed solution, timeline, pricing, assumptions, and terms. Keep it concise—no one reads a 30-page proposal. Use tables for pricing and milestones.
10. Review and submit. Check for typos, ensure all numbers add up, and verify the timeline is feasible. Submit before the deadline, and follow up with the client a week later if you haven’t heard back.

Common Mistakes

• Underestimating complexity: New developers often forget edge cases, browser quirks, and integration challenges. Always add a buffer.
• Ignoring the client’s budget: If the client says “we have $10k,” don’t bid $50k. Either adjust scope or walk away—don’t try to force a square peg.
• Not writing down assumptions: If you assume the client provides content, say so. Otherwise, you’ll be blamed for missing content.
• Bidding too low to win: Winning a project that loses you money is worse than losing the bid. You’ll resent the client and deliver poor work.
• Forgetting to include revisions: Clients always ask for changes. Include a set number of revision rounds in your proposal, and charge for additional ones.

Tips

• Use historical data: if you’ve built similar features before, use those actual hours as a baseline.
• Estimate in ranges, not single numbers: “3-5 days” is more honest than “4 days.” Then use the upper end for your bid.
• Never bid on the spot. Always take at least 24 hours to think through the estimate.
• If the project is large, consider a phased approach: bid on phase one only, with options for later phases.
• Always include a clause about change requests: any change in scope will be billed separately.

Troubleshooting

If you’ve submitted a bid but things aren’t going to plan, here’s what to do:

• Client says your bid is too high: Ask what their budget is. If it’s significantly lower, offer a reduced scope with fewer features. Don’t just slash your price—that devalues your work.
• Client asks for a breakdown: Provide a high-level breakdown (design, development, testing) without revealing your hourly rate if you don’t want to. Be prepared to justify each line item.
• You realize you underbid: Before signing, try to negotiate a slightly higher price, citing additional complexity you discovered. If you’re already under contract, document every out-of-scope request and bill for it separately.
• You haven’t heard back: Send a polite follow-up email after 5-7 business days. Ask if they have any questions. If still nothing, move on—don’t chase indefinitely.
• The project scope changes after you win: Immediately inform the client that the change affects the timeline and cost. Provide a revised estimate before proceeding.

Frequently Asked Questions

How do I price a software project if I’m a freelancer?

Use the same process: break down tasks, estimate hours, multiply by your hourly rate, add a buffer for overhead and profit. As a freelancer, your rate should cover your business expenses and time off, not just your salary.

What’s the difference between fixed-price and time-and-materials?

Fixed-price means you agree to deliver a specified scope for a set price, regardless of actual hours. Time-and-materials means you bill for actual hours worked at an agreed rate. Fixed-price transfers risk to you; T&M transfers risk to the client.

Should I include taxes in my bid?

Usually, you should state that taxes are not included, and add them as a separate line item if applicable. Check your local tax laws and the client’s location.

How much buffer should I add to my estimate?

A common rule is 20-30% for known unknowns, and another 10-20% if the project is complex or the client is vague. The more uncertainty, the bigger the buffer.

Can I bid on a project if I don’t have all the details?

Yes, but you must list your assumptions clearly in the proposal. If the client later provides details that change the scope, you can renegotiate.

How do I handle a client who wants a fixed price but keeps changing requirements?

Include a change request clause in your contract that states any change in scope will be billed separately. Also, limit the number of revisions included in the fixed price.

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