The most common financial mistake new landlords make is budgeting for income but not for all the expenses. Rent minus mortgage is not your profit. Here is every category of cost you need to account for before you buy, and how to estimate each one.
The Common Mistake
A landlord buys a property for $220,000. Rent is $1,900 per month. The mortgage payment is $1,100 per month. They budget $800 in monthly profit. In reality, after taxes, insurance, maintenance, vacancy, and property management, the property might cash flow $100 or nothing at all.
The math was right. The inputs were wrong.
Fixed Expenses
These costs happen every month regardless of whether the unit is occupied.
Mortgage payment. The full payment including principal, interest, taxes, and insurance if escrowed. Use the actual amount, not an estimate.
Property taxes. If not escrowed into your mortgage, budget the annual tax bill divided by 12. Property tax rates vary significantly by location.
Landlord insurance. For a single-family rental, expect $75 to $200 per month depending on location, property value, coverage type, and your claims history. Get an actual quote before you close.
HOA fees. If the property is in a homeowners association, budget the full monthly fee. Read the HOA documents before buying. Some HOAs restrict rentals, charge extra fees for rentals, or have rules that affect your ability to operate.
Variable Expenses
These costs vary month to month and year to year. Most investors smooth them out by setting monthly reserves.
Repairs and maintenance. Budget 1 percent of the property's purchase price per year. On a $220,000 property, that is $2,200 per year or about $183 per month. This covers routine maintenance, small repairs, and appliance servicing. Some years you spend less. Some years more. The reserve evens it out.
Property management. If you use a property manager, budget 8 to 12 percent of monthly rent. Some companies also charge leasing fees (half to one month's rent when placing a new tenant) and lease renewal fees. Factor all of it in, not just the monthly percentage.
Vacancy. Budget 8 percent of annual rent for vacancy. That covers roughly one month empty per year. Some markets run tighter. Some run looser. Eight percent is a reasonable conservative estimate for most single-family rentals.
Utilities if owner-paid. If you cover water, trash, or landscaping as part of the rental, track those actual costs and budget accordingly.
One-Time Expenses
These are costs you pay at specific points, not monthly, but they are real and must be planned for.
Closing costs. When you buy, expect 2 to 5 percent of the purchase price in closing costs. On a $220,000 property, that is $4,400 to $11,000. This comes out of pocket in addition to the down payment.
Initial repairs. Most properties need something before they are rent ready. Fresh paint, new carpet, updated fixtures, or fixing deferred maintenance. Budget this realistically before you close, not after.
Appliance replacement. Water heaters last 8 to 12 years. HVAC systems last 15 to 20. Refrigerators last 10 to 15. Know the age of every major system in your property. Budget for replacements during your ownership period.
The 50 Percent Rule
There is a rule of thumb among experienced investors: operating expenses on a rental property often run 50 percent of gross rent, not counting the mortgage. On a $1,900 per month property, that means budgeting $950 per month for taxes, insurance, maintenance, vacancy, and management.
The 50 percent rule is a rough screening tool, not a precise calculation. Use it to quickly filter out properties that clearly will not cash flow before running a full analysis.
Insurance Is One of Your Most Controllable Expenses
Unlike maintenance costs that are hard to predict, insurance is a known annual cost. You can get quotes before you buy, compare options, and choose coverage that fits your budget and risk tolerance. It is also one of the most important costs. Skipping proper coverage to save $100 per month is the wrong trade-off.
Use our profit calculator to model your actual numbers: investorpropertyinsurance.com/rental-profit-calculator
Bottom Line
Fixed costs are mortgage, taxes, insurance, and HOA. Variable costs are maintenance, management, and vacancy. One-time costs are closing, initial repairs, and capital replacements. Add all of them. The investors who build profitable portfolios are the ones who knew their full expense picture before they bought.
Ready to protect your rental income?
Start here: investorpropertyinsurance.com/get-a-quote