A "mansion tax" could be coming to D.C.

State of play: The property tax rate would go up on the value of homes above $2.5 million.

For example, the tax bill for a $2.6 million home would go up 0.3%, according to Council chair Phil Mendelson's office.

• A home worth $3 million would pay about 2.7% more. For a $5 million home, it's an 8.8% increase, equaling $3,741, per Mendelson's office.
• An estimated 2,800 single-family homes and condominiums will be affected.

The fine print: The tax rate would increase from $0.85 to $1 per $100 of assessed value over $2.5 million. (The rate would still be $0.85 for the first $2.5 million of the assessment.)

Mendelson announced the updated proposed budget on Tuesday. His changes to the mayor's version include:

• Restoring $70 million to a fund that incentivizes the pay of childcare workers.

• Funding the "baby bonds" program — trust funds for low-income children — with sports gambling revenue.
• Increasing payroll taxes on businesses.

Lawmakers will take a final vote on the budget next month.

Editor's note: This story has been updated to reflect that the tax rate is going up for homes worth more than $2.5 million (not $2.5 million and above), to correct the percentage increases used in the examples of different home values, and to add the precise dollar increase per $100 of assessed value.