The jobs that cost you money to say yes to

Almost all advice for trades is about winning more work. Very little of it is about which work to turn down, which is odd, because anybody who has been going a few years can name the job they wish they had walked away from.

Saying no feels wrong when there are gaps in the schedule. That is exactly when it costs the most to get wrong.

The short version

The job	Look back at the jobs that went badly and find what they had in common.
The finding	Most of them showed what they were before the work started.
The fault	A bad job is not only unprofitable. It occupies the week a good one needed.
The fix	Know your floor, read the early signs, and price accordingly.

A job can pay and still cost you

The obvious bad job is the one that loses money outright: the fixed price that ran three days over.

The expensive ones are quieter than that. A job that pays a little under what your week actually needs to earn never announces itself. It sits in the schedule, taking up days, while the enquiry you would rather have had goes to somebody with space that week.

That is the real bill. Not the margin on the job you took — the job you could not then take.

They tend to announce themselves early

Not always. But often enough that it is worth watching how an enquiry behaves before you have committed to anything.

• The quote that has to be itemised down to the last socket, for somebody who has three others and has mentioned all of them.
• The one where nobody can tell you who actually makes the decision.
• The customer who negotiates before any work has happened. How somebody treats a price they have not paid yet is a fair guide to how they will treat an invoice.
• The “while you are here” job, from somebody who has form for it.
• The day’s work an hour outside your patch, where the travel is real and unpaid.

None of these disqualifies a job on its own. Two or three together is a pattern.

Saying no without burning the customer

You rarely have to say the word.

You can price it properly, which is the honest version of declining. If the job is worth doing at a number that works, then the number is the answer, and it is their decision rather than a rejection. You can be straight about timing and let them choose. You can pass it to somebody it suits better, which costs you nothing and has a habit of coming back.

What does the damage is the middle option: taking it reluctantly, at a price you resent, then fitting it around the work you would rather be doing. That is the version where everybody ends up unhappy, including the customer.

The point

Turning work down is only possible if you know what work is worth to you. That is a number, not a feeling, and most people have never sat down and worked it out.

Work out the floor your rate cannot go below, and the decision stops being about nerve. It becomes arithmetic: this job clears the floor, or it does not.