What is the expected capacity increase for UMC in 2022 in terms of percentage 
rying to think of timing when the new capacity would come on. And just one follow-up on capacity. There were some talks you may consider further fabs in Singapore or additional capacity.
Do you have plans beyond 2023 for additional capacity and see that potential option?
Jason Wang -- Director and President
Sure. So the first is for the P5 10,000 expansion, the 28-nanometer will become online on Q2 2022. And the P6 will be in year of 2023, but in the later year of 2023. And we'll provide more specific the ramp schedule in a later day, given the current -- the true lead time availability update. The question about the news about the Singapore, we are unable to comment on any speculations as we always as we always do that. We don't comment on speculations. But we are always open to exploring new opportunities as long as we can enhance our shareholders benefits and we said that before as well.
Our strategy in the disciplined capex philosophy from our 2015 has not changed. We always try to drive our sustainable structural profitability based on the disciplined capex principle. So we have aligned with our customers as well as the market given our relevance in the marketplace before we're making any capex decision. Meanwhile, we continue -- we're consistently cooperating with our customer regarding the long-term development plan. Given our diversified production site, I think UMC has the luxury to evaluate different expansion options beyond P5 and P6.
And we will discuss our expansion plan accordingly once we can deliver that.
Randy Abrams -- Credit Suisse -- Analyst
And two follow-ups on that. One, you ran a few percent above 100%. But do you think as we go to next year, if demand is there, that would be the level you could operate? Or was there anything specific this quarter that you were able to push out more. So is that a level you could sustain? And then the other follow-up was since the P6 will be later 2023, besides the 10,000, is there -- how much can you get from debottlenecking or other areas I saw fourth quarter, you have a bit of that. But if you have any other meaningful capacity.
Jason Wang -- Director and President
Well, I mean in 2021, we have continued focus on the productivity improvement in addition to the incremental capacity, and we will do so for 2022 as well. And so we do expect that effort will continue. And at the current plan, and I think the -- we are targeting greater than 100%, right? But what we guided, we will guide as a fully loaded at 100%, but the effort will continue.
Qi Dong Liu -- Chief Financial Officer, Senior Vice President, Head of Corporate Governance and Company Secretary
Yes, in terms of capacity, growth rate for the 2022, we currently estimate about 6% capacity increase versus 3% capacity increase in 2021.
Randy Abrams -- Credit Suisse -- Analyst
And on eight-inch, is there any increase? Or is that all pretty much 12-inch?
Jason Wang -- Director and President
It's pretty much all 12-inch now. The debottlenecking of the product migration will probably continue, but it's still within the same pool. Yes.
Randy Abrams -- Credit Suisse -- Analyst
Okay. Great. And I wanted to ask on pricing. If you could give any look at how you're seeing pricing after this year? It looks like it might be up close to mid-teens for next year. If you see how you're seeing mature node and then also if any chance to reset the 28-nanometer? And if there's a way to think about where gross margins could go?
Jason Wang -- Director and President
Okay. Well, first of all, we do foresee that ASP momentum will continue into 2022. However, we are not taking advantage of our customers doing the wafer shortage. So we kind of position our ASP in a more longer-term partnership over the near-term cyclical factors. So we kind of work with the customers to earn their trust and instead of exploiting the short-term opportunistic profit. And we do believe the pricing will reflect our market value and position. So we foresee the ASP momentum will continue into 2022.
At this point, for the 2022, we anticipate the capacity will re
rying to think of timing when the new capacity would come on. And just one follow-up on capacity. There were some talks you may consider further fabs in Singapore or additional capacity.
Do you have plans beyond 2023 for additional capacity and see that potential option?
Jason Wang -- Director and President
Sure. So the first is for the P5 10,000 expansion, the 28-nanometer will become online on Q2 2022. And the P6 will be in year of 2023, but in the later year of 2023. And we'll provide more specific the ramp schedule in a later day, given the current -- the true lead time availability update. The question about the news about the Singapore, we are unable to comment on any speculations as we always as we always do that. We don't comment on speculations. But we are always open to exploring new opportunities as long as we can enhance our shareholders benefits and we said that before as well.
Our strategy in the disciplined capex philosophy from our 2015 has not changed. We always try to drive our sustainable structural profitability based on the disciplined capex principle. So we have aligned with our customers as well as the market given our relevance in the marketplace before we're making any capex decision. Meanwhile, we continue -- we're consistently cooperating with our customer regarding the long-term development plan. Given our diversified production site, I think UMC has the luxury to evaluate different expansion options beyond P5 and P6.
And we will discuss our expansion plan accordingly once we can deliver that.
Randy Abrams -- Credit Suisse -- Analyst
And two follow-ups on that. One, you ran a few percent above 100%. But do you think as we go to next year, if demand is there, that would be the level you could operate? Or was there anything specific this quarter that you were able to push out more. So is that a level you could sustain? And then the other follow-up was since the P6 will be later 2023, besides the 10,000, is there -- how much can you get from debottlenecking or other areas I saw fourth quarter, you have a bit of that. But if you have any other meaningful capacity.
Jason Wang -- Director and President
 Well, I mean in 2021, we have continued focus on the productivity improvement in addition to the incremental capacity, and we will do so for 2022 as well. And so we do expect that effort will continue. And at the current plan, and I think the -- we are targeting greater than 100%, right? But what we guided, we will guide as a fully loaded at 100%, but the effort will continue.
Qi Dong Liu -- Chief Financial Officer, Senior Vice President, Head of Corporate Governance and Company Secretary
Yes, in terms of capacity, growth rate for the 2022, we currently estimate about 6% capacity increase versus 3% capacity increase in 2021.
Randy Abrams -- Credit Suisse -- Analyst
And on eight-inch, is there any increase? Or is that all pretty much 12-inch?
Jason Wang -- Director and President
It's pretty much all 12-inch now. The debottlenecking of the product migration will probably continue, but it's still within the same pool. Yes.
Randy Abrams -- Credit Suisse -- Analyst
Okay. Great. And I wanted to ask on pricing. If you could give any look at how you're seeing pricing after this year? It looks like it might be up close to mid-teens for next year. If you see how you're seeing mature node and then also if any chance to reset the 28-nanometer? And if there's a way to think about where gross margins could go?
Jason Wang -- Director and President
Okay. Well, first of all, we do foresee that ASP momentum will continue into 2022. However, we are not taking advantage of our customers doing the wafer shortage. So we kind of position our ASP in a more longer-term partnership over the near-term cyclical factors. So we kind of work with the customers to earn their trust and instead of exploiting the short-term opportunistic profit. And we do believe the pricing will reflect our market value and position. So we foresee the ASP momentum will continue into 2022.
At this point, for the 2022, we anticipate the capacity will re