In a gross lease, the tenant pays one fixed rent and the landlord covers the building's operating costs. In a net lease, the tenant pays a base rent plus some or all of those costs, typically property taxes, insurance and maintenance. The labels come from US practice. In Slovenia the real answer is always in the contract, so what matters is which costs are listed, who pays them and how they are billed.
This guide explains both structures, the variants (single, double and triple net, modified gross, base year), how Slovenian practice and law treat operating costs, and what to check before you sign as a tenant or landlord.
TL;DR
- Gross lease: one rent figure, with the landlord paying operating expenses such as taxes, insurance and maintenance. It is predictable for the tenant.
- Net lease: a lower base rent, with the tenant paying all or part of the operating expenses on top. Triple net (NNN) puts taxes, insurance and maintenance on the tenant.
- Modified gross and base-year leases sit in between: the landlord covers costs up to a set level, and increases above it are passed on.
- In Slovenia, a cost can only be charged to the tenant if the contract lists it precisely, so the cost schedule matters more than the label.
- Compare offers on total monthly cost, not on the headline rent per square meter.
Table of Contents
- What a gross lease is
- What a net lease is
- Gross vs net lease: the key differences
- Modified gross and base-year leases
- A worked example
- How this works in Slovenia
- Which structure suits whom
- What to check before you sign
- Our perspective
- Get the cost structure right with HOOF
- FAQ
- Sources
What a gross lease is
A gross lease is a commercial rental agreement in which the tenant pays a fixed rent and the landlord is responsible for the major property expenses, such as taxes, insurance and maintenance. The landlord builds an estimate of those costs into the rent and carries the risk that they turn out higher.
For a tenant, the appeal is simplicity. You budget one number. For a landlord, a gross lease is easy to explain and market, but the landlord absorbs cost increases unless the contract has an escalation mechanism.
In practice, "gross" is rarely absolute. Many gross leases still leave some items with the tenant, such as in-suite electricity, internet or cleaning of the unit. That is why you should read the list of costs and not rely on the word alone.
What a net lease is
In a net lease, the tenant pays all or a portion of the property's operating expenses, such as taxes, insurance and maintenance, in addition to base rent. The base rent is lower than in a gross lease because it does not include those costs.
The "net" count describes how many of the three main cost categories the tenant carries:
| Lease type | Tenant pays in addition to base rent | Landlord typically pays |
|---|---|---|
| Single net (N) | Property taxes | Insurance, maintenance |
| Double net (NN) | Property taxes and insurance | Maintenance, structure |
| Triple net (NNN) | Taxes, insurance and maintenance | Often only major structural items, if agreed |
| Gross (full service) | Usually only its own utilities, if agreed | Taxes, insurance, maintenance |
The split is a convention, not a rule of law. A single net lease in one deal can look like a double net lease in another, so always check the clause itself.
Gross vs net lease: the key differences
The fundamental difference is who carries the financial risk of operating costs. In a triple net lease the tenant takes all three main cost burdens, whereas in a gross lease those burdens stay with the landlord. Commercial leases are commonly grouped by payment terms as net or gross, and gross leases also come in modified gross and base-year forms, according to the same guide.
| Criterion | Gross lease | Net lease |
|---|---|---|
| Rent structure | One all-in figure | Base rent plus separate cost charges |
| Headline rent | Higher | Lower |
| Cost risk | Landlord | Tenant (fully or partly) |
| Budget predictability for tenant | High | Lower, since charges can change |
| Transparency of costs | Low, costs are inside the rent | High, costs are itemized |
| Landlord's administration | Simpler billing, harder to reprice | Needs cost allocation and reconciliation |
| Typical fit | Small offices, short terms, serviced buildings | Warehouses, retail, longer terms, single-tenant buildings |
Neither is cheaper by nature. A gross rent includes a margin for the landlord's risk, and a net lease exposes the tenant to actual costs. Over a long term, the cheaper option depends on how well the costs are controlled.
Modified gross and base-year leases
Most real deals land between the extremes.
Modified gross. The tenant pays a fixed rent, and certain items (often utilities, cleaning or in-unit maintenance) are charged separately. It is the most common compromise for office space in multi-tenant buildings.
Base-year lease. The landlord covers operating costs up to the level of a reference year. If costs rise above that level, the tenant pays the increase, usually in proportion to the space it rents. The contract should state the base year, the cost items included and how the increase is calculated. Public Counsel's guide notes that the contract needs precise terms for any base year or escalation provisions.
Net lease with a cap. The tenant pays operating costs but the annual increase is limited to a percentage or a fixed amount. It is a reasonable request for any tenant on a net lease.
A worked example
The figures below are hypothetical and only illustrate the logic. Take a 200 m² office.
- Offer A, gross: €16 per m² per month, all-in. Monthly cost: €3,200.
- Offer B, net: €12 per m² per month base rent plus an operating cost advance of €4 per m² per month. Monthly cost: €3,200 at the start.
On day one the two are equal. The difference shows in year two. If building costs rise 10%, the gross tenant still pays €3,200 and the landlord absorbs the increase. The net tenant's charges rise by €80 a month, to €3,280, and a year-end reconciliation can add or return money. If costs fall, the net tenant benefits.
So the right question is not which structure is cheaper but which risk you would rather carry, and whether the price you are quoted reflects it. A net lease with a low advance and a large reconciliation bill later is a trap. A gross lease priced well above the building's real costs is one too.
How this works in Slovenia
Slovenian leases are written under the Obligations Code, which sets general rules for all obligations and requires parties to act in good faith and in line with good business customs. Between business entities, the customs and practices established between the parties count when assessing what conduct is required. Slovenian law does not define "gross lease" or "NNN" as legal categories. They are commercial shorthand, and the contract decides.
What the law gives you by default. According to a real estate finance guide for Slovenia, the landlord is generally responsible for external maintenance and structural repairs, and costs of minor repairs from regular use fall on the tenant unless agreed otherwise. To charge any cost to the tenant, the lease must state each type of cost precisely. Additional service charges depend on the agreement and vary by property type and location.
What the market does. The Surveyor's Authority report on recorded lease transactions found that in 2015, 37% of office lease contracts included neither equipment nor operating costs in the rent. Roughly 24% included both, and another 21% included operating costs but not equipment. That data is from 2015, so treat it as a sign of how mixed practice is, not as today's split. The takeaway holds: both structures are common, and many deals are hybrids.
What a Slovenian net-style clause looks like. A sample commercial lease published by a Slovenian professional association shows the tenant covering all operating costs, including heating, cleaning, waste disposal, water, electricity and telecommunications, and bearing public charges tied to the property and insurance costs. Read it as an example of how such allocation can be written, not as a standard.
Documentation beats label. Expert guidance from the Chamber of Commerce and Industry (GZS) stresses that a commercial lease is built from components, and that agreements on operating costs, investments and rent changes are frequent sources of disputes. The same source says departures from standard market rent are legitimate when they are clearly documented and understood in the contract.
VAT on service charges
If service and utility charges are billed separately from rent, they are taxed with VAT, provided the supplier is registered for VAT. Whether the rent itself carries VAT depends on the landlord's choices, which we cover in our guide to VAT on commercial leases in Slovenia. Compare offers on the same VAT basis, or a net offer can look cheaper than it is.
Which structure suits whom
A gross lease usually suits you if you are:
- a start-up or small team that needs a fixed monthly budget;
- a tenant on a short term, or one that wants a simple, serviced arrangement;
- a landlord with a multi-tenant building where costs are shared and the owner manages them centrally.
A net lease usually suits you if you are:
- a retailer, logistics operator or manufacturer that controls its own use of the space, and wants to pay only for what the building actually costs;
- a tenant on a long term who can audit costs and negotiate a cap;
- an investor who wants the income stream to be insulated from cost inflation, so rent is more clearly net income.
Space type matters. Warehouses and standalone units commonly lean net, because few shared services exist and the tenant controls consumption. Offices in managed buildings often lean gross or modified gross. You can see what is on offer across commercial spaces for rent in Slovenia, office rental in Ljubljana and retail space.
What to check before you sign
Before agreeing to an expense allocation, landlords and tenants should be clear on who pays for taxes, insurance and maintenance, and on any base year or escalation terms. Put this checklist next to the draft contract:
- Cost list. Is every chargeable item named? Heating, cooling, water, waste, cleaning of common areas, security, lift, insurance, property management fee, property tax charges.
- Management fee. Many landlords recover management costs through service charges. If it is included, is it a fixed amount or a percentage, and of what?
- Advance and reconciliation. What monthly advance is paid, when is the annual statement issued, and how fast must a shortfall or credit be settled?
- Allocation key. Are shared costs divided by floor area, by usage or by another formula? Is the area measured the same way as in the rent calculation?
- Caps and exclusions. Can you cap annual increases? Are capital investments, structural repairs and the landlord's own costs excluded from charges?
- Audit right. Can the tenant see invoices behind the charges?
- Repairs. Who handles what: minor repairs, systems like HVAC, roof, facade? Align with the default rules above, and note every deviation.
- Indexation. How does the base rent change over time, and does it apply to the cost portion too?
- VAT. Are all figures net or gross of VAT?
- Exit and security. Check the notice and break clause options, termination terms and any bank guarantee, because cost obligations continue until the lease ends.
If you are still before the contract stage, a letter of intent is a good place to fix the cost structure early, and our practical guide to lease negotiation covers the points that tend to move.
Common mistakes
- Comparing headline rents. A €12 net rent and a €16 gross rent are not comparable until the cost charges are added.
- Accepting "operating costs" without a list. A vague clause leaves room for disagreement later and, in Slovenia, a cost not clearly stated may not be chargeable at all.
- Ignoring the reconciliation. Advances are estimates. Ask for the last two years of actual statements for the building.
- Forgetting about vacancy. In multi-tenant buildings, ask whether the landlord charges tenants for the costs of empty units.
Our perspective
In our work on Slovenian commercial leases, the label "gross" or "net" is almost never the interesting part. The interesting part is the schedule behind it: which items, which allocation key, which cap and who has the right to check the invoices.
We advise tenants to compare offers on total occupancy cost over the whole term, including VAT, indexation and the realistic range of service charges. A lower headline rent with an open-ended cost clause is often the more expensive offer by year three.
We advise landlords the opposite way: a clearly drafted, itemized cost clause attracts better tenants, shortens negotiations and reduces disputes. Whether you choose gross, modified gross or net, the point is to price the risk openly and write it down.
Our boutique approach is to be involved from market analysis through negotiation to signature, so that the cost structure is understood by both sides before anyone signs. For owners, we also run the building afterwards, which is where operating costs are actually controlled.
Maruša
Get the cost structure right with HOOF
If you are leasing out a property, we help you decide which structure fits the space and the target tenant, set the rent and write the cost schedule so it holds up. If you are looking for space, we represent you in the search and negotiation. See how we work on commercial space leasing for landlords, or how property management keeps service charges under control after the lease starts.
If you want a view on what rent and costs are realistic for a specific building, our valuation and market analysis is a good starting point, and you can reach us through HOOF.
FAQ
What is the difference between a gross lease and a net lease?
In a gross lease the tenant pays one fixed rent and the landlord covers operating expenses. In a net lease the tenant pays a base rent plus some or all of the operating expenses. The practical difference is who carries the risk of cost increases.
What are the three types of commercial leases?
The usual grouping is gross, modified gross and net, with net leases further split into single, double and triple net. Public Counsel's guide describes leases as net or gross, and gross leases as including modified gross and base-year forms. Real contracts often blend these, so read the cost clause itself.
Does Slovenia recognize a triple net lease?
Slovenian law has no legal category called triple net. The Obligations Code sets general rules and good-faith standards, and the contract determines who pays what. A lease that puts taxes, insurance and maintenance on the tenant can work economically as an NNN lease, as long as each cost type is stated precisely.
Which is better for a tenant, gross or net?
Gross gives a predictable budget, while net gives transparency and a lower base rent, with variable charges. Choose gross if you value certainty and net if you can control and audit costs. Always compare total monthly cost including VAT.
Are service charges subject to VAT in Slovenia?
When service and utility charges are billed separately from rent, they are taxed with VAT if the supplier is VAT-registered. Confirm with your landlord and your accountant how the rent and charges are treated in your case.
Sources
- Gross Lease Explained: Overview, Types, Advantages (Investopedia)
- Net lease (Legal Information Institute, Cornell Law School)
- Guide to Commercial Leases (Public Counsel)
- Obligacijski zakonik (PISRS)
- Poročilo o evidentiranih najemnih poslih na slovenskem trgu (eProstor)
- Najemna pogodba, sample lease (ssrs.si)
- Različne najemnine v praksi, Milan Torkar (GZS)
- Overview of retail lease agreements: Slovenia (CMS)
- Expert guide on real estate finance law: Slovenia (CMS)
