The D.C. Council is scheduled to take a final vote on raising the city's minimum wage to $11.50 an hour by 2016.
With the Council already having approved the minimum wage hike unanimously, Tuesday's vote is considered little more than a formality.
The bill will go to Mayor Vincent Gray for his signature. Gray has advocated for an immediate minimum wage hike to $10 an hour but wants to study the prospect of further increases.
Lawmakers in Montgomery and Prince George's county have approved similar minimum wage increases in those jurisdictions. The votes follow a national trend in which states and municipalities are addressing the minimum wage in the wake of federal inaction.
The District of Columbia's current minimum wage is $8.25. That's $1 higher than the federal minimum.