Let's see it straight: your project duration ended, so you're given a new assignment in a new project. Good.
Your new assignment comes with more responsibilities - that's expected. You're more experienced now.
- They retained the designation / cadre.
- They did not "officially" transfer you, it's more like a backdoor-internal transfer.
- Your annual performance review is yet to happen (7 months down the line).
So, in your situation, where you have agreed to perform the roles and responsibilities offered to you before transitioning, you did not think of negotiating, so it's very less likely that they are going to allow you a raise right now.
I am now working on a lot bigger projects than I was before, and feel I should be paid more for this.
Usually, the scale of the project does not matter much, your salary depends on your contributions / value-adds made to the project / deliverable. Just because you are part of a bigger project / program, does not mean there's more value to your work - rather it might be the opposite.
In another words, it depends on the contributions from your side and expected roles and responsibilities. If they did not change (much) - expecting a raise just because you transitioned from one project to another does not hold any weight anyways.
My suggestion:My suggestion: Complete the remaining part of review cycle and appear in the next review meeting with
- Your accomplishments from both the projects
- How you used the transition to better yourself (handling bigger projects)
- How you made yourself useful to the organization (changed role based on need and adapted to it to deliver)
and then, negotiate for a raise. You'll have a much better shot at it that point of time.
After considering above points, if you still feel you're being underpaid: Check How should I properly approach my boss if I'm feeling underpaid?