I used to work at a Jobcentre. As long as you are still available for full-time work and are actively seeking full-time work, your JSA claim will continue. You should tell them that you have secured a job starting on 1st September and they will only require you to look for temporary work for the rest of your claim period. It will really make life easier for you at the jobcentre as they will transfer their attention to those who haven't got work lined up. You will NOT get JSA until your first pay from your new job comes through. You will have to close your claim with 31st August, at the latest, being your last day of JSA as you will be an employee from 1st Sept even if school strats later in that week. They will then send you whatever JSA is owing to 31st August and you will need to plan for how you will manage financially from that last JSA payment until your first salary towards the end of September. If your finances are very tight, you may be able to get an advance of pay earlier in September. If you need that, I'd advise asking for the bare minimum (perhaps only what you would have had access to on JSA) as the remainder, payable at the end of the month will have to last you for the following month. If you are claiming Housing benefit, you should look into whether they still let you get the HB for 4 weeks after notifying them of your new employment circumstances. When I worked for the Jobcentre in 1997/8 longer-term HB claimants had that facility so that they didn't immediately fall into rent arrears when JSA income stopped and new employment wages were paid monthly in arrears.