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VAT on common areas in commercial buildings

VAT on common areas becomes challenging when a commercial building includes VAT-taxable, VAT-exempt and vacant areas. See what landlords should document.

Published 16 September 2026

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Illustrative photo of two property managers reviewing a floor plan and VAT zones in the common area of a commercial building.

VAT on common areas in commercial buildings becomes challenging when a building combines VAT-taxable, VAT-exempt and vacant areas. Knowing how many square metres each tenant occupies is not enough. Landlords must show how the areas are used, which tenancies are covered by voluntary VAT registration in Norway, and why the chosen allocation key gives a reasonable picture.

This guide explains which information should be connected. It does not replace VAT or legal advice for an individual case.

What does VAT on common areas in commercial buildings mean?

VAT on common areas in commercial buildings concerns how input VAT on shared costs is allocated when not all of the building is used for VAT-taxable activities. Costs for reception areas, corridors, technical rooms and other shared functions may relate to several tenants at once. Deductibility must therefore be assessed against actual and anticipated use and the scope of voluntary VAT registration in Norway.

Letting real property is generally exempt from VAT in Norway. Voluntary registration may allow input VAT deductions when premises are let to a business using them for VAT-taxable or VAT-compensable activities. A mixed-use building therefore has three practical zones:

  1. areas covered by voluntary VAT registration
  2. areas outside the registration
  3. common areas and costs that need to be allocated
Control model for the VAT basis in a commercial building, covering leases, floor area, use, vacancy and allocation keys.
Changes to the lease, floor area or use can affect the entire VAT basis.

VAT on common areas in commercial buildings starts with the lease

The lease is not just a legal document. It is a central part of the VAT basis. For each tenant, it should be clear which exclusive areas and share of common areas the agreement covers, how the premises will be used and from which date the tenancy applies.

A binding agreement and clearly defined use are central to voluntary VAT registration in Norway. If the tenant carries out both VAT-taxable and VAT-exempt activities, it must also be established whether certain areas are used exclusively for the exempt activities or are shared areas used for both types of activity (myldrearealer).

This means lease changes must be reflected in VAT management. An addendum covering additional space, subletting, a change of use or a revised handover date can affect the basis. If the agreement is in one folder and the VAT allocation key in a separate spreadsheet, it is easy to keep using a calculation after its assumptions have changed.

Four pieces of information that should reconcile

A traceable control model should connect at least these four pieces of information:

1. Floor area

Keep an up-to-date overview of exclusive leased areas, common areas, technical rooms and any vacant premises. Floor-area data must match the leases, floor plans and allocation key actually used.

2. The tenant's use of the premises

Document whether the tenant conducts VAT-taxable, VAT-exempt or mixed activities in the premises. A tenant declaration can be an important part of the basis, but should be followed up when the business or use changes.

3. Time period

The basis for VAT deduction is not static. Move-ins, move-outs, vacancy, subletting and changes of use can alter the position during the year. Start and end dates should therefore be just as clear in the lease overview as in the calculation.

4. Cost and allocation key

Distinguish costs attributable directly to one area or tenancy from costs relating to several parts of the building. For shared costs, the chosen key must be objective, consistent and documented. Floor area may be relevant, but is not automatically the right basis in every situation.

Also read our guide to service charges in commercial buildings (https://estatelab.no/nytt-og-nyttig/felleskostnader) for the connection between budgets, advance payments, allocation keys and reconciliation.

Example: one building, three different situations

Imagine a three-storey office building. The ground floor is let to a VAT-taxable consultancy. The first floor is let to a business providing VAT-exempt services. The second floor is vacant. All floors use or are connected to reception, stairs, the lift and technical installations.

This is an illustrative example, not a definitive deductible percentage. The point is the working method:

  • The agreement and the use of the ground floor must be documented.
  • The VAT-exempt use on the first floor must be separated out.
  • Vacancy on the second floor must be recorded with dates and assessed under the applicable rules.
  • Costs for shared functions must be linked to a justified allocation key.
  • The calculation must be updated when a new tenant moves in or the use changes.

Published decisions from the Norwegian Tax Administration show that common areas, vacancy, subletting, completion dates and changes of use can have major significance. Treating the VAT allocation key as an annual exercise copied from the previous period is therefore risky.

When should the VAT basis be reviewed?

A practical routine is to review the basis when events occur, not just on a fixed date. Schedule a review when:

  • a new lease is signed
  • a tenant moves in or out
  • the floor area or use changes
  • a sublease or addendum is agreed
  • premises become vacant
  • refurbishment, extensions or major improvements are completed
  • the service charge budget or allocation key changes
  • the annual reconciliation is being prepared

For buildings covered by the Norwegian VAT adjustment rules, historical records must be retained over time. This includes not only the calculation, but also the documentation explaining why it was correct when it was made.

How to build a verifiable workflow

Start with one consolidated checklist for each building:

  1. Review the leases. Check the leased premises, share of common areas, use, dates and any addenda.
  2. Reconcile floor areas. Make sure the lease area, floor plan and system records match.
  3. Classify the use. Document VAT status and exclusive or mixed use for each tenant.
  4. Record changes. Log vacancy, move-ins, move-outs, subletting and changes of use with effective dates.
  5. Explain the key. Describe why the allocation method is representative of the cost concerned.
  6. Connect the documents. Make the lease, tenant declaration, calculation and vouchers accessible from the same review point.
  7. Seek expert advice when in doubt. Capital goods, refurbishment, subletting and mixed use may require a case-specific VAT assessment.

The aim is not more spreadsheets. It is to ensure that the next review can trace the path from lease and floor area to cost and VAT treatment.

In summary

VAT on common areas in commercial buildings cannot be handled using one fixed percentage for every building and period. A sound basis shows who rents the premises, which areas the agreement covers, how the premises are used, what is vacant, which costs are shared and why the chosen allocation key is defensible.

When this information is connected, it becomes easier to spot changes before they affect invoicing, reconciliation and VAT reporting.

Want to see how Estatelab can bring leases, floor areas, tenants and financial follow-up into one structured data foundation? Book a demo (https://estatelab.no/book).

Sources

  • Norwegian Tax Administration: decision on input VAT deductions for refurbishment costs relating to common areas (https://www.skatteetaten.no/rettskilder/type/vedtak/skatteklagenemnda/fradrag-for-inngaende-mva-pa-rehabiliteringskostnader-knyttet-til-fellesareal.-endret-bruk-av-kapitalvare.-om-fellesareal-og-parkeringskjeller-skal-anses-som-egne-byggetiltak.-merknad-i-mva-melding/)
  • Norwegian Tax Administration: decision on partial VAT deduction for common areas (https://www.skatteetaten.no/rettskilder/type/vedtak/skatteklagenemnda/vedtak-om-delvis-fradragsrett-for-fellesareal/)
  • Norwegian Parliament: written question and answer on VAT on service charges (https://www.stortinget.no/no/Saker-og-publikasjoner/Sporsmal/Skriftlige-sporsmal-og-svar/Skriftlig-sporsmal/?qnid=25466)
  • Sticos: VAT deductions for rental buildings (https://www.sticos.no/fagstoff/slik-oppnaar-du-fradrag-for-mva-paa-utleiebygg) (the publisher marks this as an older article)

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