By the PPA Funding team Last updated
If you buy commercial solar outright, payback typically falls within several years, driven mainly by how much of the generation you use on site and your electricity price. Under a PPA there is no payback period to wait for — you save from day one because there was no upfront cost to recover.
What determines payback when you buy
For an outright purchase, payback depends on the system cost, how much of the solar you self-consume (rather than export), your grid electricity price, and any capital allowances claimed. Energy-intensive sites with high daytime use tend to pay back fastest.
Why a PPA has no payback wait
Under a PPA you pay nothing upfront, so there is no capital to recover. You simply pay a lower rate for the solar from day one, meaning immediate net savings without a payback period at all.
Getting real numbers
Payback and returns depend entirely on your own figures — usage, tariff, roof and funding route. A free proposal models the outright-purchase payback and the PPA savings side by side so you can compare.
This guide is general information, not financial or tax advice. Your circumstances determine what applies — please confirm with your accountant or advisor. Get a tailored proposal →
Frequently asked questions
How many years is typical for solar payback?
For an outright purchase it commonly falls within several years, but it varies widely with your energy use and price. We model it precisely for your site rather than quoting a generic figure.
Does a PPA have a payback period?
No. Because there is no upfront cost, there is nothing to pay back — you save from day one by paying a lower rate for the solar you use.
Sources & further reading
Related guides
- Capital allowances on commercial solar: full expensing & AIA explained
- How solar improves your commercial EPC (and helps with MEES)
- How much can your business save with commercial solar?
See our funding options, commercial solar and solar by industry pages.