Day Rates vs Fixed-Price Quotes: Which Should Builders Use?

Introduction

Pricing is one of the biggest headaches in the building trade. Get it wrong and you either scare off a client or end up working for nothing. Day rates and fixed-price quotes both have their place, but too many builders default to one method without thinking about whether it actually fits the job. This guide breaks down both options so you can make the right call every time.

What Is a Day Rate?

A day rate is exactly what it sounds like. You charge a set amount per day — or sometimes per hour — for your time and labour. Materials are usually charged on top, either at cost or with a markup.

Day rates are common for small maintenance jobs, emergency call-outs, or works where nobody really knows how long things will take until the work starts.

Typical day rates for builders in the UK currently range from £200 to £450 per day, depending on the trade, region, and experience level.

What Is a Fixed-Price Quote?

A fixed-price quote gives the client one number for the whole job. You agree the scope of work upfront, price everything in — labour, materials, plant, waste disposal — and commit to delivering it for that amount.

If the job takes longer than expected, that's your problem. If you buy materials cheaper than planned, that's your gain. The risk and the reward sit with you.

Fixed-price quotes are standard for extensions, new builds, renovations, fit-outs, and most projects where a proper specification exists.

The Case for Day Rates

Day rates make sense in specific situations. Here is when they work in your favour:

1. The scope is genuinely unknown. Stripping out an old bathroom wall to find the condition of the structure behind it. Opening up a roof without knowing what you will find. When you cannot scope it, you cannot price it properly.
2. Small reactive jobs. A day's work fixing a leaking flashing or repointing a chimney stack. Writing a detailed fixed-price quote for a four-hour job wastes everyone's time.
3. Client-driven changes are likely. Some clients change their minds constantly. A day rate protects you from absorbing the cost of their indecision.
4. You are working as a subcontractor on a managed site. The main contractor controls the programme. You show up, do the work, and bill the hours.

The downside? Clients are often nervous about day rates. They worry there is no incentive for you to work efficiently. That concern is not always fair, but it is real. Day rates can also create disputes when clients feel a job has taken longer than it should.

The Case for Fixed-Price Quotes

Fixed-price quotes win more work. Full stop. Most domestic clients and many commercial clients want certainty. They are borrowing money, planning budgets, or managing cash flow. A clear number they can sign off on makes their life easier.

Fixed-price quotes also force you to think through the job properly before you start. That process alone can save you money by catching things you would otherwise miss.

The risks are real though. If your quote is too low, you eat the loss. If something unexpected comes up mid-job, you either absorb it or have a difficult conversation with the client. A good contract with clear exclusions and a variation process is essential.

5 Tips for Getting Your Pricing Right

1. Always visit the site before quoting. Never price from photos or client descriptions alone. What clients describe and what exists are often very different things.
2. Build your exclusions list. Every fixed-price quote should clearly state what is not included — existing structural issues, groundworks beyond a specified depth, asbestos, unknown drainage conditions. This protects you from scope creep.
3. Price your materials with a markup. Sourcing, ordering, chasing deliveries, and managing suppliers takes time. Passing materials through at cost is giving that time away for free. A 10 to 15 percent markup is standard and reasonable.
4. Use software to speed up your quotes. Tools like MyQS help builders produce professional, accurate quotes quickly — so you spend less time on paperwork and more time on site. Faster quotes mean you win more work before a competitor gets there.
5. Have a clear variation process. Put in writing how changes to scope will be priced and authorised. A simple email confirmation from the client before additional work starts is enough to protect you in most disputes.

Which Is Better for Your Business?

There is no single right answer, but here is a practical way to think about it.

If you can scope it, fix-price it. If you cannot scope it, use a day rate — but be honest with the client about what you expect the job to cost and flag early if it is running over.

The builders who struggle most are those who apply one method to every job out of habit. They fix-price something they should have day-rated and lose money. Or they day-rate something that should have been scoped properly and end up in a dispute with a client who expected a number.

The most profitable builders in the UK use both methods — and they know which one to reach for depending on what the job actually is.

Frequently Asked Questions

Can I switch from a day rate to a fixed price mid-project?

Yes, and sometimes it makes sense to do so. If you started on a day rate while scoping the works and now have a clear picture of what is involved, converting to a fixed price gives the client certainty going forward. Just make sure both parties agree the switch in writing before you proceed.

What should I do if a fixed-price job turns out to be far bigger than expected?

Stop and talk to the client as soon as you realise. Do not wait until the job is finished to raise a variation. Document what you have found, explain why it was not foreseeable, and provide a revised cost in writing. Most clients respond better to early honesty than a surprise invoice at the end.

Do day rates include VAT?

If you are VAT registered, yes — VAT applies to your day rate just as it does to any other supply of services. Make sure your invoices clearly show the net rate, the VAT amount, and the gross total. If you are not VAT registered, you cannot charge VAT regardless of the rate type.

Conclusion

Day rates and fixed-price quotes are both valid tools. The builders who price confidently and win the best work are the ones who understand which method fits which job — and who present their pricing professionally every time.

Clear quotes build trust. Trust wins contracts. And winning contracts at the right price is what keeps your business growing.

Ready to quote faster and win more work? Visit myqs.ai and see how UK builders are taking the pain out of pricing.