Quoting jobs is one of the most important skills a tradesman can learn.
A good quote can win the right work, protect your time, and ensure the job is profitable. A bad quote can lead to long days, difficult customers, and very little money at the end of the week.
Many tradesmen lose money not because they lack skill, but because they make simple quoting mistakes.
Most of these mistakes are common, especially when you’re busy and trying to get quotes out quickly.
Understanding these problems can help you avoid them and run a far more profitable business — something closely linked to How to Price a Job Properly (Step-by-Step for Tradesmen)
Quoting Too Quickly
Many tradesmen quote jobs on the spot without thinking things through properly.
A customer asks for a price and the response is:
“About £400.”
This usually happens under pressure.
The problem is that quick quotes are based on guesses, not proper calculations.
Important details get missed, and the job ends up costing more than expected.
A better approach:
“Let me work it out properly and I’ll send a quote.”
Taking extra time protects your profit.
Underestimating Labour Time
One of the most common mistakes is underestimating how long a job will take.
Tradesmen often think in best-case scenarios.
But reality includes:
- Hidden issues
- Extra prep work
- Material delays
- Unexpected complications
When time is underestimated, profit disappears with every extra hour.
This is one of the main causes of undercharging — explained in Why Most Tradesmen Undercharge for Jobs
Good habit: Add a 20–30% time buffer.
Forgetting the Small Costs
Many quotes include labour and main materials but miss smaller costs like:
- Fixings and consumables
- Sealants
- Waste disposal
- Delivery
- Fuel
Individually small — but over time they eat your profit.
This is exactly why having a structured day rate matters, covered in How to Calculate Your Day Rate as a Self-Employed Tradesman
Not Writing the Quote Clearly
Some quotes are too vague:
“Supply and fit lights – £350.”
This creates confusion.
Customers may assume extra work is included.
A better quote should outline:
- Work included
- Materials included
- What’s excluded
Clarity avoids disputes and protects your time.
Charging Too Little to Win the Job
Many tradesmen drop their price to win work.
This leads straight to underpricing.
Winning jobs that don’t make money is not success — it’s slow failure.
Being busy doesn’t mean being profitable — something explained in Why Being Busy Doesn’t Mean You’re Making Money
Most customers don’t just want cheap — they want reliable and professional.
Not Allowing for Unexpected Problems
Every job has unknowns:
- Hidden damage
- Poor previous work
- Incorrect installations
If your quote is too tight, even small issues wipe out profit.
Always include a buffer.
Letting Customers Negotiate the Price Down
Some customers will always try to negotiate.
If your price drops every time, your profit disappears.
If your quote is properly calculated, you shouldn’t need to reduce it.
Instead, explain:
- What’s included
- The quality of your work
- Why it costs what it does
Customers focused purely on price are often the most difficult.
Not Charging for Small Jobs Properly
Small jobs are often underpriced.
But they still involve:
- Travel
- Setup
- Admin
Without a minimum charge, they become unprofitable.
Many tradesmen use a minimum call-out fee to protect their time.
Final Thoughts
Quoting mistakes are extremely common — especially when you’re busy.
But small pricing errors have a big impact on profit.
The goal isn’t to win every job.
The goal is to win the right jobs at the right price.
If you consistently struggle with money despite being busy, it’s usually not the work — it’s the pricing.
This often leads to bigger financial pressure later, including tax stress, covered in How to Avoid the January Tax Panic
Takeaway
- Don’t rush quotes
- Always include all costs
- Add time buffers
- Price for profit, not just work
Winning every job usually means you’re charging too little.
A strong business is built on profitable work, not just busy weeks.
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