Guernsey's emergency services control centre overspent by £159,000 last year, and is expected to do the same this year.
They say it is because of staff costs which are higher than budgeted, after recruiting trouble and staff having to work overtime.
The Joint Emergency Services Control Centre was created in March 2015 and is the central control for all four emergency services.
JESCC's budget for 2016 was £951,000, but they ended up spending £1.1m.
Home Affairs has promised a plan has been put in place to "stabilise costs" and create a "robust operating model".
The centre is thought to be the first of its kind in the world, something the top civil servant for Home Affairs says means there was no model to learn from.
Staff contracts have been changed, with wage increases but the 37.5 hour working week is being replaced by 42 hours.
The government's Internal Audit department will now review the new plan.