Teagasc puts solar farm rents in Ireland at €2,200 to €3,500 per hectare per year, and notes that €2,200 to €3,000 is now more common because developers have grown more opportunistic. Converted to the unit most landowners think in, that is roughly €890 to €1,415 an acre, with the realistic band closer to €890 to €1,215. Against the €245 to €350 an acre that grazing ground let for last year, the letter from the developer looks transformative. The tax treatment is where a good deal of that advantage goes, and almost nobody leads with that part.
- Teagasc benchmark: €2,200 to €3,500 per hectare per year, with €2,200 to €3,000 more common
- Per acre that is roughly €890 to €1,415, against €245 to €350 for grazing and silage ground in 2025
- Solar lease income gets no traditional farming tax relief, is fully taxed, and you cannot offset expenses against it
- The lease runs 25 years or more, and Teagasc notes agreements often last 30 or even 40 years
- An option agreement comes first, typically up to five years with a possible three-year extension, and it is not a guarantee anything gets built
- Your site needs to be near a 33 kV line or substation. A 10 kV line is usually no use
- Keeping panels under 50% of the farm matters for agricultural relief and working-farm status
What Developers Are Actually Paying
Teagasc publishes its figures per hectare, drawn from the Solar Energy Guide for Dairy Farms produced by John Upton, Barry Caslin and Francis Quigley of Teagasc with Michael D. Murphy of Munster Technological University. The headline range is €2,200 to €3,500 per hectare per year. Teagasc then adds a qualifier worth reading twice: developers are increasingly opportunistic, and €2,200 to €3,000 per hectare is more common in practice.
Most Irish landowners negotiate in acres, so here is the same range converted. One hectare is 2.471 acres, and the per-acre column below is our conversion of the Teagasc figures rather than a separately published benchmark.
| Teagasc band | Per hectare / year | Per acre / year |
|---|---|---|
| Lower end | €2,200 | €890 |
| More common upper end | €3,000 | €1,214 |
| Top of published range | €3,500 | €1,415 |
Three things move a number within that range: location and sunlight levels, the scale of the project, and grid connection costs. Some developers also offer a payment linked to the site's turnover on top of the base rent, and Teagasc advises negotiating a separate additional payment if battery storage is added to the site.
Rental income is typically linked to inflation. That matters more than it sounds over a contract this long. A flat €900 an acre in 2026 is a very different proposition to €900 an acre in 2051, and an index clause is the difference between the two.
How It Compares to Letting the Same Ground for Farming
The comparison that actually decides this is against what the field earns now. The SCSI/Teagasc Agricultural Land Market Review and Outlook 2026, published on 28 April 2026, gives the 2025 rental picture by province.
| Province | Grazing / meadowing / silage | Change on year |
|---|---|---|
| Munster | €350 per acre | up 19% |
| Leinster (excl. Dublin) | €299 per acre | up 2% |
| Connacht / Ulster | €245 per acre | up 18% |
Tillage ground does better. Leinster cereal crop land let at €306 an acre, down 4%, while land for other crops such as maize, sugar beet and beans reached €383 an acre, up 9%. The report forecasts both land prices and rental values rising about 4% on average in 2026.
So the gross gap is somewhere between roughly two and a half times and five times, depending on your province and where the negotiation lands. On the letter from the developer, that is the whole argument. It is not the whole argument.
The Tax Difference Nobody Leads With
This is the part that changes the maths, and it is stated plainly by Teagasc: income from solar farm leases does not qualify for traditional farming tax relief. All lease and option income is fully taxed, with no opportunity to offset expenses against it.
Compare that to letting the same ground to an active farmer on a long-term lease. Income tax incentives introduced in 2014 are still in place, and Teagasc sets out the qualifying conditions: the lease must run a minimum of five years and a maximum of 25, the land must be wholly or mainly occupied for the purposes of farming, and critically, the lessee must carry on a trade of farming on the leased lands.
A solar developer does not farm. That single condition is why the relief does not travel across, and it is the mechanism behind the Teagasc line above.
Teagasc works a straightforward example. A 20-year lease at €2,200 per hectare generates €44,000 per hectare over the 20 years. After income tax at 40%, the net is €26,400 per hectare. Converted, that is about €17,800 an acre gross falling to roughly €10,700 an acre net across two decades, or a little over €530 an acre a year after tax.
Put €530 net beside a farming lease at €299 an acre that may attract relief, and the picture is still favourable but a good deal less dramatic than the gross comparison suggests. Your own figures depend entirely on your marginal rate and circumstances, which is why every source on this subject, Teagasc included, insists on professional tax advice before signing.
What Happens to Your BISS Payment
Parcels with solar panels are considered case by case, but in general they remain eligible for the Basic Income Support for Sustainability and other area-based schemes, with the panels themselves treated as ineligible features within the parcel. The same way rock, hardcore or a roadway is treated.
The requirement that catches people is agricultural activity. Land only stays eligible if there is genuine agricultural activity in the parcel, and on a solar site that means grazing sheep. Cattle are not practical among the arrays; smaller ruminants are. If the panels and their supporting structures reduce the eligible area by more than 70%, the parcel is considered ineligible altogether. Below that, a reduction co-efficient applies and the eligible area is scaled back proportionally.
The Option Agreement Comes First, and It Is Not the Lease
Almost every landowner approached by a developer signs an option agreement long before any lease exists. The two get conflated constantly, and they are completely different animals.
An option agreement gives the developer permission to access your land for surveys and planning purposes. Teagasc describes it as typically lasting up to five years, often with the opportunity to extend by a further three years if certain milestones are met. During that window the developer is trying to assemble four things: planning permission, a grid connection, the survey work, and a successful bid into a Renewable Electricity Support Scheme auction. A winning auction bid guarantees financial support for the project, which is usually what makes it bankable.
By signing, you agree that if the developer meets those conditions, you will enter the longer-term lease. If they do not, the option lapses and nothing gets built. Years can pass on ground that is effectively committed while you carry on farming it, and that uncertainty is a real cost even though nobody invoices you for it.
Teagasc's practical guidance on this stage is specific and worth following to the letter:
- Make the developer cover all costs, including legal and professional fees, planning and grid applications, whether or not the project ever completes
- Avoid exclusivity agreements until the full Heads of Terms have been agreed
- Provide for decommissioning and site reinstatement, for example a clean-up or security bond, or an insurance policy
- Check indemnity insurance is in place for both the option period and the lease period
- Pin down construction practicalities: timing and duration, access, impact on drainage and soil structure, post-construction clean-up and fault correction. Teagasc notes some landowners have been left with significant damage after lengthy and messy construction
One more clause to look for. Many option and lease agreements say that if the developer sells the project on, they need the landowner's consent, though in general that consent cannot be unreasonably withheld or delayed. Given how often Irish solar projects change hands, make sure the clause is there.
Will Your Land Even Be Wanted?
Plenty of landowners work through the rental maths before establishing whether their ground is a candidate at all. Site selection is ruthless, and the grid does most of the ruling out.
What developers look for, per Teagasc:
- Proximity to a suitable power supply. Sites near a 33 kV distribution line or substation are ideal. Smaller 10 kV lines are usually unsuitable, and 110 kV transmission lines carried on steel pylons are often too large to connect to
- No third-party land in the way. Needing to cross somebody else's ground to reach the connection adds cost and complication
- Flat ground or south-facing slopes
- Seclusion from housing, which reduces the risk of planning objections
Scale has moved sharply. Between 2018 and 2020 most solar farms entering the Irish planning system were 50 to 100 acres. Since 2021 projects of 250 acres and more have become common, and development is shifting towards schemes of 40 MW or more to capture economies of scale. The ready reckoner Teagasc uses is 3 to 5 acres per MW, or about two hectares per MW, which means a 40 MW scheme needs at least 80 hectares and current projects in the region of 100 MW need several hundred acres. Larger projects connect at 110 kV or 220 kV, either by underground cable to a viable substation or by tying directly into an overhead transmission line.
Grid capacity is the hard constraint. Spare capacity remains limited across much of Ireland, and Teagasc's advice is blunt: if capacity is available near you, act quickly, because it may only be sufficient for one scheme in the area. Whoever gets there first takes it.
What a 25-Year Lease Actually Locks Up
If the developer exercises the option, you lease the land for 25 years or more. Teagasc notes elsewhere that these agreements often run 30 years, and in its review of renewable land use describes lease arrangements as typically long term, often spanning 40 years.
Sit with that number against the rest of the farm plan. A 25-year lease signed in 2026 runs to 2051. If there is a successor, the ground comes back to them under terms agreed before they had any say. If there is no successor yet, the lease may be exactly the stable income that makes the holding viable. Neither answer is wrong, but the question deserves asking before the rate is negotiated rather than after.
It is also worth knowing that leasing to an active farmer for up to 25 years does not affect the landowner's ability to qualify for Retirement Relief from Capital Gains Tax, whereas conacre letting can jeopardise it. The solar equivalent runs on the separate rules set out above, which is another reason the two routes need to be compared on net terms rather than headline rent.
The Other Option: Generate on the Farm Instead
Leasing a field to a developer is not the only way to earn from solar on Irish farmland, and for many holdings it is not the better one. The alternative is owning the generation yourself and cutting the electricity bill rather than collecting rent.
The TAMS 3 Solar Capital Investment Scheme pays a 60% grant rate towards solar PV on the farm, with its own ring-fenced investment ceiling of €90,000 separate from other TAMS schemes. The scheme is open for applications through the agfood portal, and the Department of Agriculture, Food and the Marine last updated the scheme page on 23 June 2026.
The two routes suit different situations, and they are not mutually exclusive:
| Leasing land to a developer | On-farm solar under TAMS | |
|---|---|---|
| What you get | Rent, index-linked | Lower electricity costs, plus export income |
| Land needed | Hundreds of acres for a modern scheme | Roof space or a small ground area |
| Capital required | None | 40% of cost after the grant |
| Commitment | 25 years or more | You own the asset |
| Grid barrier | Needs 33 kV capacity nearby | Standard connection |
| Tax on income | Fully taxed, no farming relief | Bill reduction, not taxable income |
A dairy farm with high daytime demand for milk cooling and water heating tends to do better owning the panels than renting out ground. A drystock holding with a 33 kV line running along the boundary and no successor lined up is the classic candidate for a lease. If you are heading down the on-farm route, our guides to system size limits and microgeneration and export payments cover what happens to the surplus, and the Clean Export Guarantee rates page tracks what suppliers are paying for it.
Frequently Asked Questions
How much does a solar farm pay per acre in Ireland?
Teagasc puts solar farm rents at €2,200 to €3,500 per hectare per year, and notes that €2,200 to €3,000 per hectare is more common because developers have become more opportunistic. Converting at 2.471 acres to the hectare, that works out at roughly €890 to €1,415 an acre, with the realistic band nearer €890 to €1,215. Location and sunlight levels, project scale and grid connection costs all move the figure within that range, and battery storage on the site should be negotiated as an additional payment.
Is solar farm rent better than letting land in conacre?
On gross rent, comfortably. The SCSI/Teagasc 2026 report puts 2025 grazing, meadowing and silage rental at €350 an acre in Munster, €299 in Leinster and €245 in Connacht/Ulster, against roughly €890 to €1,215 an acre for solar. After tax the gap narrows a lot, because solar lease income does not qualify for traditional farming tax relief and cannot be offset with expenses, whereas a qualifying long-term lease to an active farmer can attract income tax relief. Compare the two on net figures with your accountant, not on headline rent.
How long is a solar farm lease in Ireland?
If the developer exercises the option, the lease runs 25 years or more. Teagasc notes that agreements often last 30 years or more, and describes renewable energy lease arrangements as typically spanning up to 40 years. Before the lease there is an option agreement, usually up to five years with a possible three-year extension, during which the developer pursues planning permission, a grid connection, surveys and a Renewable Electricity Support Scheme auction bid.
Do I pay tax on solar farm lease income in Ireland?
Yes, and at your full marginal rate. Teagasc is explicit that income from solar farm leases does not qualify for traditional farming tax relief, that all lease and option income is fully taxed, and that there is no opportunity to offset expenses against it. Teagasc's worked example: a 20-year lease at €2,200 per hectare generates €44,000 per hectare gross, leaving €26,400 per hectare after income tax at 40%. Take professional tax advice before signing, particularly if succession or transfer to a family member is part of the plan.
Will solar panels affect my BISS payment or agricultural relief?
Parcels with solar panels are assessed case by case but are generally eligible for BISS, with the panels treated as ineligible features in the same way as rock or a roadway. Agricultural activity must continue in the parcel, and grazing sheep counts. If the panels and their structures reduce the eligible area by more than 70% the parcel becomes ineligible; below that a reduction co-efficient applies. Separately, land under panels does not qualify for agricultural relief unless less than 50% of the total farm area is covered, and keeping under that 50% line also preserves working-farm status for tax purposes.
What kind of land do solar developers want in Ireland?
Grid access decides most of it. Developers want sites near a 33 kV distribution line or substation, because 10 kV lines are usually unsuitable and 110 kV transmission lines are often too large to connect to. They also want flat ground or south-facing slopes, no need to cross third-party land, and distance from housing to reduce planning objections. Scale matters too: the ready reckoner is 3 to 5 acres per MW, schemes are moving to 40 MW and above, and projects of 250 acres or more have been common in the Irish planning system since 2021.
Should I lease land to a developer or install solar on the farm myself?
It depends on your electricity demand and how much land you can commit. The TAMS 3 Solar Capital Investment Scheme pays 60% towards on-farm solar PV under a ring-fenced €90,000 investment ceiling, which suits holdings with high daytime demand such as dairy farms with milk cooling and water heating. Leasing suits larger holdings near suitable grid capacity, particularly where there is no immediate successor and stable long-term income matters more than flexibility. Leasing requires no capital but commits the ground for 25 years or more.
Solar lease rents, option agreement terms, site criteria, tax treatment and BISS guidance from Teagasc, drawing on the Solar Energy Guide for Dairy Farms (Upton, Caslin, Quigley, Teagasc; Murphy, MTU) and Teagasc's review of agricultural land use for renewable energy generation by Barry Caslin. Agricultural rental values from the SCSI/Teagasc Agricultural Land Market Review and Outlook Report 2026, published 28 April 2026, reporting 2025 rents. Long-term leasing tax conditions from the Teagasc Long-Term Land Leasing fact sheet. TAMS Solar Capital Investment Scheme figures from gov.ie, Department of Agriculture, Food and the Marine, page last updated 23 June 2026. Per-acre figures are converted from Teagasc's published per-hectare rates at 2.471 acres per hectare. Tax reliefs and thresholds change and depend on individual circumstances: take professional tax and legal advice before entering any option or lease agreement.