Extra hours have just come up in my workplace. Currently I am hugely topped up with tax credits due to myself and my DD being disabled and being a single parent. So I work 26 hours a week at around £10 an hour. I'm thinking of adding on four but will lose more in tax credits, and tax, than I will earn. So basically I'll be around £25 a week worse off working extra hours. Stick with me... I've just been given a mortgage in principle on my own which is amazing! However I'm thinking of moving in with OH at some point in the next year. At which point I'll lose all my tax credits and so in turn the mortgage offer ive just received will also go down as it's taken my TC in as income currently. So at the point I move in with OH I'll need the extra pay. What would you do?