rent payable in advance constitutes an annuity in advance for the landlord.
Examples of annuity in advance
annuity in advance
Insurance companies, by contrast, will tell you in advance how much an income annuity will pay each month.
From the money.cnn.com
The problem that the lifespan is not known in advance can be reduced in some countries by the purchase at retirement of an inflation-indexed life annuity.