@Greg Rementer Hey Greg, that's great you're entering the commercial NNN rental world! Coming from residential leases, NNN leases are so much more advantageous because they protect you from increased operations costs and maintain a steady net rental income. Sounds like you have the basics down with what the tenant will be responsible for covering.
For utilities, you have two options:
1. Put them in your name, pay them directly, then charge the tenant back through the NNN charges.
2.The easier approach is to have the tenants put the utilities (water, sewer, garbage, electricity) in their name. That way they manage all those bills, and it's less for your to keep track of and bill the tenant for later on. If you have multiple tenants and only one meter for a particular utility, this won't work, and you'll want to manage that utility as in option 1. This goes for garbage too if you have multiple tenants using common dumpsters. But you could have each tenant get their own dumpster.
Other expenses (insurance, property taxes, maintenance) will then be charged in the NNN portion of their rent. Since these expenses are for the most part known for the year, estimate out what they will cost for the year, then determine the cost on a monthly basis and charge the NNN accordingly. If a tenant moves in mid-year or between property tax payments, then you will have to calculate the pro-rated amount for these expenses.
At the end of the year when you reconcile your expenses, you'll have a few possible scenarios:
1. If your expenses exceed what you collected in NNN, then you bill the tenant for the difference in one lump sum at the end of the year. You will then set next year's NNN charges based on those expenses. Of course if you know what your new property taxes will be, or insurance premium increase, then factor those in as well.
2. A second option is to take that deficiency, if it's small, and amortize that over the next year's NNN payments. The tenant would then pay the adjusted NNN as calculated in #1, along with the monthly portion of the deficiency from the prior year.
3. If expenses are less than what was estimated and the tenant over paid, then this balance can be amortized over the next 12 months and you would reduce the NNN charges for the next year accordingly, still determining the next year's NNN as in #1.
Either way, you will need to keep meticulous records of all expenses, pro-rated amounts, etc. Not only will this ensure you are collecting everything you can for expenses, but you will be able to show the tenants the exact expenses and what they paid should they request them. Often in commercial leases there is a provision that states the landlord will provide a cost breakdown and explanation of NNN charges to the tenants at the end of the year.
Certainly there is more bookkeeping and tracking involved but again, you get the added benefit of not having to incur fluctuations in expenses like you do with residential leases, and your net rental income is consistent.
Hope this broad overview is helpful. There are a few other items to consider (base-year provisions, tenancy pro-rations) but the above covers the basics that will get you going. Certainly if this sparks other questions let me know!