How to Write a Bid: Price Your Work, Structure Your Offer and Win More Construction and Service Jobs

To learn how to write a bid, think of it as a priced offer that answers one question for the buyer: can you do this job, at this price, by this date? A good bid states the scope, the price, the schedule and the terms clearly, proves you can deliver, and makes it easy to say yes.

This article covers construction and service bids, how a bid differs from a proposal and a quote, how to price without guessing, a step-by-step writing process, a sample and the mistakes that lose jobs.

What is a bid?

A bid is a formal offer to do specific work for a stated price within a stated time. The buyer asks for bids, compares them and usually picks one. Once accepted, a bid often becomes the basis of a contract, so accuracy matters.

Bids are common in construction, trades, maintenance, cleaning, landscaping, transport, IT services and public purchasing. The buyer may be a homeowner, a company or a government body.

Who asks for bids?

• Property owners and builders who need subcontractors for a defined job.
• Businesses buying a repeat service, such as cleaning or security.
• Public bodies that must compare suppliers openly. Their rules are stricter, and the bid often has to follow a fixed format.

What is the difference between a bid, a proposal and a quote?

People mix these terms. The names vary by country and industry, so always follow the wording in the request itself.

Document	Main purpose	Typical content	Typical use
Bid	Win a defined job by competing on price and terms	Scope, firm price, schedule, terms, qualifications	Construction, trades, public purchasing
Proposal	Persuade the buyer with a solution	Problem, approach, deliverables, price, proof	Services, consulting, creative and software work
Quote	Give a price for known items or work	Items, unit prices, total, validity	Simple purchases and small jobs
Estimate	Give a rough price that may change	Approximate costs and assumptions	Early planning

A bid sits close to a quote but with more detail on scope and terms. A proposal sells an approach, while a bid mostly sells reliability and value for a clear scope. For writing a pure price document, see how to send a quote to a client, and for the persuasive side, read how to do a proposal for a job.

What types of bids exist?

Type	How it works	Best when	Main risk
Fixed price (lump sum)	One price for the full scope	Scope is clear and stable	You pay for any missed cost
Unit price	Price per unit, such as per metre or per hour	Quantities may change	Totals can surprise the buyer
Time and materials	Hourly rate plus materials at cost	Scope is unclear	Buyer fears an open-ended bill
Cost plus	Actual cost plus a fee or percentage	High uncertainty, trusted parties	Needs careful tracking
Competitive sealed bid	All bids submitted by a deadline, compared together	Public or formal purchasing	Little room to explain later

Choose the type the request asks for. If it does not say, a fixed price with clear exclusions is the easiest for most buyers to compare.

What should you do before you start writing?

1. Read the full request twice. Note scope, quantities, site details, deadlines, format, insurance needs and how bids will be judged.
2. List your questions. Ask them early and in writing. If other bidders get the same answer, the process stays fair.
3. Visit the site if you can. Photos and walk-throughs catch access problems, hidden work and special conditions.
4. Decide whether to bid at all. Skip jobs where scope is vague, the schedule is impossible or the buyer pays late by reputation. Time spent on bad bids costs you good ones.
5. Check your capacity. Make sure you have the people, equipment and licences to deliver on the dates you will promise.

How do you write a bid step by step?

1. Open with a cover letter or summary. Name the project, state your total price and timeline in the first lines, and thank the buyer in one sentence. Keep it to half a page.
2. Restate the scope in your words. This proves you understood the job and lets the buyer correct you before work starts.
3. List inclusions and exclusions. Exclusions protect you. For example: permits, removal of hazardous material, work above a certain height or after-hours work.
4. Build the price. Break it into labour, materials, equipment, subcontractors, overhead, contingency and profit. Show a clear total.
5. Set the schedule. Give a start date, major milestones and a finish date. Mention what could change the dates.
6. State payment terms. Deposit, progress payments, final payment, accepted methods, late fees if legal and fair.
7. Add the validity period. Prices change. Say how long the bid stays open, for example 30 days.
8. Include qualifications. Licences, insurance, safety record, similar projects and references. Only claim what you can prove.
9. Define changes. Explain how extra work is requested, priced and approved in writing.
10. Add acceptance lines. A signature and date block makes the bid easy to accept.
11. Proofread and check the format. Match the requested file type, page limit, forms and submission method.

How do you price a bid without guessing?

Price from your own costs, not from what you think rivals will charge. A low bid that loses money is worse than a lost bid.

Cost element	What it includes	How to estimate it
Direct labour	Hours times loaded hourly cost, including taxes and benefits	Past similar jobs and time records
Materials	Items plus waste and delivery	Current supplier quotes
Equipment	Rental or ownership cost for the job	Rental rates or internal rates
Subcontractors	Specialist work you do not self-perform	Written quotes from them
Overhead	Insurance, office, vehicles, software, admin	Your yearly overhead spread across your jobs
Contingency	Allowance for unknowns	Higher when the scope or site is unclear
Profit	What the business keeps	Your target margin for this type of work

How do you stay competitive without underpricing?

• Show value: faster start, tidy site, better warranty, clear communication.
• Offer options, such as standard and upgraded materials.
• Reduce risk for the buyer with a firm schedule and a written warranty.
• Walk away if the price needed to win leaves no profit.

How do you write a construction bid?

Construction bids need extra care because scope, safety and site conditions drive cost. Add these items to the general steps above.

• Drawings and specifications: list which documents and revisions you priced from.
• Quantities: show how you measured, or state that you used the buyer’s quantities.
• Permits and inspections: state who applies and pays.
• Site conditions: note access, power, water, storage and parking assumptions.
• Allowances: list items with a set budget, such as fixtures, so the buyer knows the limit.
• Weather and delays: explain how delays outside your control affect time and cost.
• Insurance and licences: attach proofs the request asks for.

Rules vary by location, so check your local licensing rules and, for government jobs, the buyer’s published instructions. In the US, the Small Business Administration publishes general guidance for small firms that want to sell to the government.

How do you write a bid for a service job?

Cleaning, landscaping, IT support and similar jobs repeat every week or month, so define the service level clearly.

• Frequency: how often, on which days, at which hours.
• Task list: exactly what you do on each visit.
• Standards: how you measure good work, such as a checklist signed after each visit.
• Supplies and equipment: who provides what.
• Contract term: length, renewal and how either side can end it.
• Response time: how fast you fix problems.

What does a sample bid look like?

Sample bid summary (replace every detail with your own):

Project: Repaint of ground-floor office, 4 rooms and hallway.
Scope included: surface repair, one primer coat, two finish coats, protection of floors and furniture, daily cleanup.
Excluded: ceiling repairs beyond minor patching, moving of heavy furniture, work outside 8:00 to 17:00.
Price: fixed total, with labour and materials listed separately on page two.
Schedule: start within 10 working days of acceptance, finish in 6 working days.
Payment: 30% deposit, balance on completion.
Valid for: 30 days from the date of this bid.
Extra work: priced and approved in writing before it starts.

This format works because a buyer can compare it with other bids line by line in a minute.

How do you make your bid stand out?

• Use the buyer’s words. Mirror the request’s terms and headings so the reviewer finds each answer fast.
• Be specific about people. Name your project lead and give their relevant experience.
• Show similar work. Short descriptions of two or three comparable jobs with what you delivered. Do not invent references.
• Explain your approach in a few lines. Safety, quality checks, communication.
• Reduce the buyer’s worry. A clear warranty and a simple change process build confidence.
• Look professional. Clean layout, no spelling errors, consistent numbers.

If you sell services online, the same ideas apply to freelance work. Our guide to sending proposals on Upwork and the article on Upwork Connects cost help you decide which jobs deserve a bid.

What mistakes should you avoid?

• Missing the deadline or format. Many buyers throw out late or incomplete bids without reading them.
• Unclear scope. If the scope is fuzzy, disputes follow. Write inclusions and exclusions.
• Underpricing to win. You will either lose money or cut quality.
• Forgetting overhead and contingency. Direct costs alone never cover the business.
• Copying an old bid. Wrong names, dates and prices are common and look careless.
• Promising dates you cannot meet. Late delivery harms reputation more than a longer, honest schedule.
• Hiding terms in fine print. Clear terms build trust.
• Not asking questions. Guessing at unclear requirements creates cost errors.
• No follow-up. A polite check-in after submission can help, unless the rules forbid contact.

What is the bid checklist?

Done?	Check
☐	Read the request twice and listed all requirements
☐	Questions sent before the question deadline
☐	Scope, inclusions and exclusions written
☐	Price built from labour, materials, overhead, contingency and profit
☐	Schedule, payment terms and validity period stated
☐	Licences, insurance and references attached
☐	Numbers added up and checked by a second person
☐	Submitted in the right format before the deadline

Frequently asked questions

How do you write a bid for a job?

Read the request, define the scope, price your costs plus profit, set the schedule, add terms and proof of ability, then submit it on time in the requested format.

What should a bid include?

A good bid includes a summary, scope with inclusions and exclusions, price, schedule, payment terms, validity period, qualifications and an acceptance block.

What is the difference between a bid and a proposal?

A bid mainly offers a price and terms for a defined scope. A proposal also argues for an approach and a solution. Some buyers use the words interchangeably, so follow their instructions.

What is the difference between a bid and a quote?

A quote prices known items or small jobs. A bid is usually more formal, covers a larger scope and often becomes part of the contract once accepted.

How do you price a bid?

Add direct labour, materials, equipment, subcontractor costs, overhead and contingency, then add your profit margin. Base each part on your records and supplier quotes.

How long should a bid be?

As long as needed to cover the scope clearly. Small jobs may fit on one or two pages. Larger or public jobs may need many pages and attachments.

Can you change a bid after submitting it?

It depends on the rules. In many formal processes you cannot change a sealed bid after the deadline, though you may withdraw it. For private jobs, ask the buyer if a revision is welcome.

Should the lowest bid always win?

Not always. Many buyers weigh experience, schedule, quality and risk along with price. That is why a clear, credible bid can beat a cheaper one.

Conclusion

A winning bid is clear, accurate and easy to compare. It shows that you understood the job, priced it honestly, can deliver on time and handle changes without drama. Do the groundwork before you write, and the writing becomes simple.

Your action list:

1. Read the request and ask your questions early.
2. Write the scope with inclusions and exclusions.
3. Build the price from real costs, overhead, contingency and profit.
4. Add schedule, payment terms and validity period.
5. Attach proof of ability and check every number.
6. Submit before the deadline, then follow up politely.

If you bid for freelance work and want drafts in your own tone, see how to use BidStaff.

Other related articles

• How to send proposals on Upwork
• How to write Upwork proposals
• How to send a quote to a client
• How to write a tender
• How to find freelance clients

About the Author

Muhammad Shahzad is the founder of BidStaff and Leadslancer. He runs Upwork accounts for a freelance and agency team, and builds BidStaff around that daily work. Editorial note: This article is written from hands-on proposal work and reviewed before publishing; it is general information, not legal or financial advice.