Financing

PPA vs lease comparison

Enter your usage, a PPA quote, and a lease quote. See which structure costs less over the same contract length once both escalators are applied.

Your numbers

1 Project details Optional
Shown on your exported report. Leave blank to skip.
2 Your usage
Find this on a recent utility bill.
3 The PPA quote
4 The lease quote

How it works

Three steps to your comparison

Step 1

Get quotes for both structures

Pull the exact rate and escalator from each proposal. If you only have one quote so far, the PPA cost calculator or solar loan vs lease comparison can help you evaluate it on its own first.

Step 2

Match the contract length and usage assumptions

Use the same monthly usage and contract term for both so the comparison is apples to apples. Most residential PPAs and leases both run 20 or 25 years.

Step 3

Weigh total cost against payment predictability

The cheaper option on paper isn't always the more convenient one. A lease's fixed payment is easier to budget around than a PPA's usage-based bill, even if the PPA ends up costing slightly less.

Reading your PPA vs lease result

Why a PPA often edges out a lease

Because a PPA only charges for power actually produced, a system that slightly underperforms its estimate costs you less that month under a PPA, while a lease payment stays the same regardless. Over a full contract, that usually tips the total in the PPA's favor, though the gap depends heavily on the specific rates quoted. On a matched 900 kWh comparison at 2.9% escalators, the PPA came out about $10,363 cheaper over 25 years. The commercial solar lease vs loan comparison covers a related decision for a business-scale system.

Why some people prefer a lease anyway

A fixed monthly payment is simpler to plan around than one that shifts with weather and season, which matters for anyone budgeting tightly. A lease also removes any ambiguity about production shortfalls affecting your bill, since the payment is contractually fixed for the year regardless of output. The cash vs lease savings comparison can help you see how a lease stacks up against paying cash outright too.

How the escalator affects each structure differently

An escalator compounds a per-kWh rate in a PPA and a flat fee in a lease, but the dollar effect is similar since both are multiplying against roughly the same starting cost basis. Run the PPA escalator rate calculator if you want to isolate just that variable on the PPA side. The DOE's homeowner's guide to solar financing covers both structures in more general terms.

What both structures have in common versus ownership

Neither a PPA nor a lease lets the homeowner claim a federal tax credit, since the solar company retains ownership of the system in both arrangements, though as of 2026 an owned system no longer has a residential credit to claim either. The third party owned vs owned comparison covers that broader tradeoff against buying the system outright.

What to check before signing either contract

Confirm the exact escalator, whether there's a production guarantee, and what your options are at contract end, renewal, buyout, or removal. If you're weighing a mid-contract exit, the lease buyout cost calculator estimates what that might cost partway through. The CFPB's issue spotlight on solar financing covers general contract considerations worth reviewing too.

Questions

Frequently asked

It depends on the specific rates quoted, but a PPA is often slightly cheaper because it charges per kWh actually produced rather than a flat fee regardless of output. On a 900 kWh household comparing a $0.14/kWh PPA against a $150 lease, both escalating at 2.9% over 25 years, the PPA comes out about $10,363 cheaper in total.

A PPA charges you for the electricity the system actually generates, priced per kWh, so your bill can vary month to month with production. A lease charges a fixed or escalating flat fee regardless of how much power the system produces, similar to a car lease payment.

Yes, both structures typically include an annual escalator in the 1.9% to 3.9% range, most commonly 2.9%, that raises the rate or payment every year of the contract. Some providers offer a 0% flat-rate option on either structure, usually at a higher starting price.

A lease is simpler to predict since the payment is fixed for the year regardless of weather or production, making budgeting easier. A PPA payment fluctuates with actual sunlight and system output, which can make monthly bills less predictable even though the underlying rate is fixed.

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Keep comparing your financing options

PPA cost calculator Solar loan vs lease comparison PPA escalator rate calculator Third party owned vs owned Lease buyout cost calculator Cash purchase vs financed payback Quick financing comparison All financing tools