6 Gross rental income and service charge income
| | 2019 | 2018 |
|---|
Theoretical rent | 235,529 | 213,376 |
Incentives | (687) | (928) |
Vacancies | (4,934) | (5,354) |
Total gross rental income | 229,908 | 207,094 |
The Fund leases its property investments in the form of non-cancellable operating leases. The nature of the theoretical rent has an indefinite duration because there are no fixed contract periods.
Service charge income amounted to € 6.3 million (2018: € 5.5 million) receivable from tenants for the services utilities, caretakers, etc. when the Fund acts as a principal.