One recent case I consulted on involved someone who calculated that purchasing a condo in New York City and renting it out would yield a healthy monthly cash flow, only to be shocked when it actually resulted in a loss. The issue stemmed from only considering the rental income without properly accounting for property taxes, management fees, and loan interest.

According to data compiled by Zumper as of August 2026, the average rent in New York City is $4,493, and in Manhattan, it rises to $5,395. The median rent for a one-bedroom is $4,460, while a two-bedroom averages around $5,380. This represents a 2 percent increase compared to the previous year. Zumper's data also shows seasonal trends, indicating that the difference between the most expensive and least expensive months can reach $504, with the median rent in January being $3,794, which is 6.9 percent lower than the annual average. If the property is for investment rather than personal use, this seasonality can be useful for timing the acquisition of new tenants.

In a market with such high rents, it may seem that cash flow would be easy to achieve, but in reality, one must reconsider not the total rental income but the portion recognized by lenders. When assessing loan eligibility, only about 75 percent of the expected rental income is considered as income, and documentation such as lease agreements or rent schedules from appraisals is required.

The loan terms themselves differ from those for owner-occupied homes. For investment properties, the down payment increases to between 15 and 25 percent, and a credit score of at least 620 is required to qualify for a loan, with better rates available for scores above 740. Interest rates are typically set 0.5 to 0.75 percentage points higher than those for owner-occupied properties.

The property tax structure in New York City is particularly complex compared to other areas. For the 2026 fiscal year, the final tax rate for Class 1 properties, which include one to three-family homes, is 19.843 percent, while Class 2, which includes condos and co-ops, is 12.439 percent. However, Class 1 properties are taxed based on only 6 percent of their market value, while Class 2 properties are taxed on 45 percent, which can lead to misunderstandings if one only looks at the nominal tax rates. The actual tax burden can vary significantly based on the type of building and assessment method, so it's wise to verify this on a property-by-property basis.

Tenant laws are one of the most critical aspects to consider when investing in New York City. Buildings constructed before 1974 with six or more units are often subject to rent stabilization regulations, and since the 2019 HSTPA amendment, these regulations cannot be lifted regardless of how much rent increases. If you plan to purchase a rent-stabilized building, it is essential to check the current tenant's rental history and the status of any regulations before finalizing the contract.

Given this context, applying the 1 percent rule can be practically challenging. Based on the median rent of $4,460 for a one-bedroom in Manhattan, the purchase price should be below $446,000, which is difficult to achieve considering the condo prices in New York City. Instead, recalculating using metrics like the cap rate, which is the ratio of annual net operating income to the purchase price, seems to be a more realistic approach. In a market like New York City, where purchase prices are high, the cap rate is a more useful indicator for comparing profitability across different areas or types of buildings than the 1 percent rule.

Management costs cannot be overlooked either. If you hire a property management company, expect to pay 8 to 12 percent of the monthly rent as a fee, and it's common to set aside about 1 percent of the asset's value annually for maintenance reserves. Landlord insurance, which includes coverage for rental loss and tenant liability, is also typically more expensive than standard homeowners insurance.

For investors aiming for capital gains, the 1031 exchange is worth considering. This allows for the deferral of capital gains tax when reinvesting in like-kind property after a sale, with detailed requirements available on irs.gov. Returning to the initial case, what the investor overlooked was not the rental income but the complete picture that included property taxes and management fees.

The figures discussed in this article are for reference only and do not constitute investment or legal advice. It is advisable to consult real estate and tax professionals before finalizing any contracts.