Good man. Chancellor Alistair Darling has imposed a 50 per cent tax on all banker bonuses over Â£25,000. The Chancellor said it was only fair to impose this tax on banks who pay out more than Â£25,000 in individual bonuses because all UK banks have benefited from the taxpayersâ bailouts and fiscal measures. The move was widely predicted today and is expected to raise Â£0.5bn. It is a one-off levy. Darling also said he would put in place anti-avoidance measures to prevent banks from getting around the tax.