Changing non-spouses’ interest deductions needs a binding debt agreement

Joint borrowers who are not married cannot simply transfer interest deductions between their tax assessments.Skat Skattestyrelsen’s guidance requires a binding agreement changing the allocation of debt between them and documentation supplied to the authority before it can redistribute the deduction.Skat The agreement can usefully be put in writing.

The deduction follows the agreed internal allocation of debt. The authority’s examples expressly cover situations where the loan agreement with the bank has not changed. Its guidance distinguishes this internal arrangement from liability to the lender: co-borrowers may remain jointly liable to the bank even though they have agreed a different allocation between themselves. Skattestyrelsen does not advise on transferring debt and cannot itself transfer debt between the borrowers.

The evidence must identify every person on the loan by name and CPR numberSkat, name the bank or mortgage institutionSkat, and give the loan’s identifying details, such as registration or CVR number and account numberSkat. It must state the new percentage allocation among all borrowersSkat and the date of the binding agreementSkat. Skattestyrelsen uses the loan identifiers to match the request against information reported by the lender.

One borrower can submit the information through TastSelv, but the documentation must clearly show that every borrower has accepted the agreement, for example through signaturesSkat. The authority says it cannot process the request without documentation.Skat The reallocation applies from the agreement date until the agreement or relevant loan circumstances change, such as repayment or refinancing.

The guidance describes a separate process for married, cohabiting spouses: the transferring spouse can move interest expenses through the calculator next to tax-assessment box 41 or 42. It expressly excludes transfers where either spouse is taxed under the researcher tax scheme or where foreign income receives the specified foreign-tax relief.Skat Those exceptions qualify the general spouse-transfer route.

The administrative basis described here is Skattestyrelsen’s guidance on deduction of interest expenses, including its binding-debt-agreement documentation requirements and its stated exceptions referring to kildeskatteloven sections 48 E–48 F and ligningsloven sections 33–33 A.