WASHINGTON — Officials are putting the final touches on what will be nearly a week of celebrations for Donald J. Trump’s inauguration as president on Friday. But pomp and circumstance does not come cheap.

Here’s a peek at the dollars and cents behind the events in Washington.

How much will it cost?

The price of Inauguration Day and the week leading up to it could top $200 million, based on the cost of inaugurations past and estimates by officials planning the week’s events. Costs could fluctuate depending on the weather on Inauguration Day and the size of the crowd that turns out.

Who foots the bill?

In bureaucratic terms, the costs are shared by the Joint Congressional Committee on Inaugural Ceremonies, the Presidential Inaugural Committee, the federal government, and state and local governments.

Put more simply: Private donors and taxpayers split the bill.

What is the Presidential Inaugural Committee, and where does it get its money?

The committee comprises friends and loyal donors of Mr. Trump’s. With a staff of several hundred people, it plans all of the eye-catching events of the week, including inaugural balls, a concert on the eve of the swearing-in, and a series of private dinners for the president and his incoming administration. The group then raises money from private donors to cover the costs.