Business plan writing: a guide for pros
What customers ask, how to win the job, and what to put on your profile.
Offering business plan writing
Business plan clients need a document that will hold up when a lender or investor reads it. Show that you test assumptions before you write them down, and that you keep the plan honest about what is not yet known.
What customers ask
- Who will read this plan, and what sections do they expect?
- Can you build the financial projections?
- How do you check my assumptions?
- Can you write a short summary as well as the full plan?
- How long will it take?
How to win the job
- On the first call, ask who will read the plan and what decision it supports, then say which section will need the most work.
- Ask for the client's current numbers, customer data and any market research, and list the assumptions you need them to confirm.
- Show a sample section, such as the market section, with the sources named, so the client sees your method.
- Put the sections, whether you or the client build the projections, and the review round into the quote, so the scope is clear.
- Write each assumption in plain words next to the figure it supports, so the client and the reader can check it.
- Tell the client in your first reply that you will flag any assumption you cannot support, so they know the plan will be honest rather than flattering.
What to put on your profile
- Sample plan sections, with the business type and reader noted, shared with permission or as anonymized examples.
- Industries and business stages you have written plans for.
- Your process: intake, research, assumptions, draft and review.
- A note on how you present projections and assumptions.
Follow-up that helps the customer
- Offer to review the plan after the first year, comparing actual results with the assumptions the plan made.
- Suggest a short lender or investor summary drawn from the full plan, if the client needs one.
- Offer a review of the plan before each meeting with a lender or investor.
Licenses and permits
Business plan writing is not commonly licensed, so you usually do not need a license to offer it. Check with your state or local licensing agency for business registration and any rules that apply to financial documents, and keep a written agreement that names the sections and who is responsible for the numbers.
Questions
Should I build the financial model myself?
Only if you have the skill to do it well and the client knows who is responsible for each figure. Put that split in the agreement, and say which figures the client must confirm.
How do I show I can write plans for a particular industry?
Show a sample section for that industry with the sources named, and describe what lenders in that field usually ask about. Clients can check your sections against their own notes.
What if the client's numbers do not support the plan?
Tell them plainly and show them what the numbers do support. A plan that does not match the numbers is a risk to the client, so raise it before the draft is finished.
Pro reviewers
Pros who offer business plan writing remotely can improve this guide, like Wikipedia. We check every edit before it goes live. Every approved edit is credited in the edit history and on the pro's profile.
Edit history
- Oct 29, 2026: Drafted by infinibell to our content guidelines.
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