Under the plan, the Postal Service is working out agreements with at least eight and as many as 10 national retail chains for same-day delivery. The mail agency says nondisclosure agreements don’t allow it to reveal the companies. But given the somewhat limited pool of large-scale retailers — they must have a physical presence in 10 or more big U.S. cities to be a postal partner — the list is expected to include department stores, sellers of general merchandise, clothiers, even perhaps a major e-commerce company or two.
Consumers will have until 2 or 3 p.m. to place an online order with a participating retailer, clicking the box that says ‘‘same-day delivery’’ and making the payment. Postal workers then pick up the merchandise from nearby retail stores or warehouses for delivery to homes between 4 and 8 p.m. that day. In San Francisco, the post office will closely track work hours and travel, which could quickly add to costs depending on traffic, total package volume or the proximity of merchandise in a delivery area.
‘‘We’re trying to revolutionize shipping; we’re not simply trying to get a niche market of consumers,’’ said Gary Reblin, the Postal Service’s vice president for domestic products. He believes people of varying ages and income levels — young adults who don’t own cars, older Americans who are less mobile — will welcome avoiding costly or time-consuming trips to the store.
By targeting big partners, Reblin said, the post office eventually hopes to push pricing down by making same-day delivery a standard option on retail web sites.
The new same-day offering is part of the post office’s blossoming shipping and packaging business. That sector was one bright spot in the mail agency’s dismal 2012 financial report, which showed a loss of $15.9 billion and forecast more red ink next year
This holiday season, the post office expects a 20 percent jump in its package volume, higher than its shipping rivals.