Polish equivalent of "cash in hand" or "Homer"?

In the UK a small job that a tradesman does outside his regular employment for "cash in hand" would be called a "homer".
What is the equivalent called in Poland ?
Also how would you say " No job too big or small" in Polish.
( Just trying to help out a couple of guys recently come over )

Hi. This kind of job we usually call "fucha" - especially when job is undertaken by builder.
It is not formal language - it is not very likely to be formal for tax purposes too...
You can also use "praca dodatkowa" which is polish equivalent for "additional job".
I'm not sure if this is exactly what You're looking for.

Thanks Wonski 81 - "fucha " sounds exactly what I am looking for.

I think that what you mean is godziny dodatkowe which is the same as overtime in English