Hi Robert,
How is the rent structured - NNN or MG?
Does the space have a hood and grease trap? - If not offer TI specific to hood and grease trap and ensure this becomes part of the space (tenant leaves it behind when they leave).
Are you providing a fresh coat of paint or any floor treatments? If yes make sure you count this in your TI allowance.
There is no standard formula to calculate TI allowance, however, calculate your effective rent/ year and see how much you are willing to give up from that. Here is how you would calculate your effective rent:
Year 1 (11 months) $25.00 x 5,000 sf x (11 / 12) = $114,583
Year 2 (12 months) $25.50 x 5,000 sf = $127,500
Year 3 (12 months) $26.00 x 5,000 sf = $130,000
Total Consideration = $372,083
Effective Rent $372,083 / 5,000 sf / 3 years = $24.81 / sf / year
If you have not yet agreed upon a rent, find out how much TI the tenant is expecting and amortize that into your base rent here is an example: