Adding a day while at the parks?

[1420Elexismc]

I was wondering if anyone has experiencing adding a day on while they were at the parks. I am definitely purchasing at least a 1 day park to park ticket for our trip in May, but we may have a free day later in the week. We may or may not want to use that day for another day at Universal, but don't want to buy a 2 day park to park right away since we may decided not to go back.
I vaguely remember considering this on our last trip in 2015, but don't recall how the pricing worked(it was so long ago!) so I am looking to see if anyone has recent experience with this
Thanks!

 

[Lynne G]

Universal always will take your money. Just go to any customer service before your day ends, and they add a day, when you pay. Haven’t added lately, but did pay for the renewal of my DD’s pass at a customer service place in City Walk.

 

[Pooh's World]

I was wondering if anyone has experiencing adding a day on while they were at the parks. I am definitely purchasing at least a 1 day park to park ticket for our trip in May, but we may have a free day later in the week. We may or may not want to use that day for another day at Universal, but don't want to buy a 2 day park to park right away since we may decided not to go back.
I vaguely remember considering this on our last trip in 2015, but don't recall how the pricing worked(it was so long ago!) so I am looking to see if anyone has recent experience with this
Thanks!

Just get the annual pass. Price isn't that different