Not much to go on, but it starred Richard Briars.
The only scene I can remember is when Richard Briars character writes a computer programme to organise the family budget.
He realises that to make it work, he has to end the programme.
Not sure when it was on, but it was definately in colour
It is not Ever Decreasing Circles or The Good Life
Thought it might be Marriage Lines, but that is in black and white and only 2 seasons survive.