Rent Rolls And Commercial Property Viability 

08/18/2026 10:46 AM       Mark Goodman

While managing a large commercial property with tenants is plenty of work in itself, it can be quite lucrative to have a property that generates a fair amount of income each month. Because of this, commercial property investing has become quite popular in the last decade, but how can you know if the rental property you’re considering buying is actually a savvy investment opportunity? One way to get a better idea of a property’s income viability is by looking at their rent rolls.  

When you’re first looking at investing in commercial rental properties, many listings or realtors will push GPI at you, which stands for Gross Potential Income. GPI would be a wonderful data point to look at if we lived in a perfect world, because GPI tells you how much a property could bring in assuming max occupancy at market rate. If every apartment was full and everyone was paying the market rental amount for the area, here’s what you could bring home every month! Wouldn’t that be ideal? 

Unfortunately, we don’t live in a perfect world. Many rental vacancies have some rental spaces available, and even if they are full at one point or another, tenants are going to move out eventually and units will go unrented, even if it’s just for a month or two. 

Moreover, GPI assumes that every single tenant is paying the market rate for an apartment. Many tenants have likely signed leases that have them below the current market rate, and you may not be able to legally do much to increase their rent enough to match market demands. Raising rent to match market prices also gives tenants an incentive to look elsewhere for housing, so trying to get closer to market rate comes with plenty of risk. For those reasons, using GPI as an indicator of a property’s potential income value isn’t a great benchmark. 

Instead, during the early stages of negotiations or during the due diligence stage, request to view the property’s rent rolls. A rent roll is a register of the rent amount that each tenant pays. It will show a full list of the current tenants and how much they pay each month, and since rent is almost always the biggest source of income for a rental property, this document can provide you with a much more realistic picture of financial performance and viability of a property. 

And while a rent roll can provide you with a clearer look at a property’s profitability potential, it’s not the only factor you should consider when looking into commercial rentals. You may still have opportunities for income from: 

• Parking spaces 

• Vending machines 

• Advertising space 

• Pool/Gym access 

All of these income sources should be considered when determining a property’s financial viability, but a rent roll will paint a much clearer picture than an unrealistic GPI projection. 

For more tips on how you can make smart financial decisions when it comes to commercial property acquisition, or to protect the assets you already have, connect with the team at Commercial Partners today at (612) 337-2470.