Amazon wants to hire 125,000 delivery and warehouse workers and said Tuesday that it is paying new hires an average of $18 an hour in a tight job market as more people shop online.

Competition for hourly workers has become fierce, and many companies are offering higher pay, sign-on bonuses and other incentives. Last week, package delivery company UPS promised to handout job offers in 30 minutes after candidates apply for many of the 100,000 holiday workers it plans to hire.

Amazon's starting pay is still $15 per hour, but with labor markets growing so tight in regions of the country, the company said new hires could make as much as $22.50 an hour. It's also paying sign-on bonuses of $3,000 in some places. 

When it began paying at least $15 an hour in 2018, Amazon was one of the first major companies to do so. But others have caught up. Target and Best Buy pay $15 an hour, too. Costco pays $16 an hour. Now, Amazon is finding it has to offer more: Last week, it said it would pay the full college tuition for hourly workers starting next year. 

More people have shifted from stores to online shopping over the past year during the pandemic, and retailers have adjusted hiring to accommodate those patterns. Amazon, which is now the nation's second-largest private employer, hired 500,000 people last year alone. 

To keep up with the surge in online ordering, Amazon said that it has opened more than 250 new warehouses, airport hubs and other delivery facilities this year. It plans to open another 100 this month alone.

The company said most of its job openings are in 18 states: Arizona, California, Colorado, Florida, Georgia, Illinois, Indiana, Kentucky, Maryland, Michigan, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Tennessee, Texas and Washington.