West Midlands Police is looking to make £500,000 savings to fund policing two major political conferences in Birmingham this year.
The force estimates it will need £4.5 million to ensure security at Labour's spring gathering later this month and the Conservatives first annual conference in October.
It has secured £4 million from the Home Office, but said it would have to look to its own budgets to raise the remaining £500,000.
A spokeswoman for the force said: "It won't come from Birmingham taxpayers. It will come from the policing budget through savings we are looking to make to find the £500,000."
The combined events are expected to represent the biggest security operation the city has seen since world leaders gathered for the G8 summit in 1998, with some 4,000 police deployments.
West Midlands Police plans to draw on lessons learned during G8. The summit, which went ahead without hitch, was hailed a major success for Birmingham, highlighting it as a major conferencing destination to the world.
Chief inspector John Mayne who is responsible for co-ordinating the conference security, said: "The most important thing is safety. The other important thing to stress is that we will not impact on local delivery of neighbourhood policing. We are not going to be drawing away from the policing of Birmingham city centre."
The force is also bidding for £2 million to help develop the policing infrastructure that will make Birmingham better able to handle future major political conferences. The majority of the cash will go towards creating an operations and co-ordinating suite which will provide a single strategic focus for such events.
"This will enable us to police major events in the 21st century," said Chief Insp Mayne.
"The conferences we are having this year are not going to be a one-off. We are going to get better at bringing other people into the city and we will have to deliver security for them.
"We need to be prepared for that."
The Conservative Party has pledged to hold a second annual conference in the city in 2010.
That coupled with this year's Tory gathering in the city, is expected to net the local economy £40 million, according to Marketing Birmingham.
Neil Rami, chief executive of Marketing Birmingham, said: "These conferences are a massive boost for the city.
"Not only will we welcome some 11,000 delegates to our hotels, restaurants, bars and shops, but there is no doubt that the timing of these events will attract an enormous national and international media presence."