Tenant screening is the process of evaluating a rental applicant against a written, uniform standard before you sign a lease, using some mix of a credit report, a criminal and eviction background check, income verification, and prior landlord references. The point is not to find a perfect tenant, it is to predict whether this person will pay the rent and keep the unit, and to be able to explain every approval and every denial with the same neutral criteria.
In practice
Say you list a unit at $1,800 a month and decide your bar before anyone applies: income at or above three times rent (so $5,400 a month gross), a credit score floor of 620, no unpaid prior-landlord judgments, and two reachable references. Applicant A reports $6,300 in monthly income, a 690 score, and two landlords who both pick up the phone. Applicant B reports $5,000, a 640 score, and one reference who confirms a $400 deposit was withheld for damage. A clears every line. B misses the income test by $400 and carries an open deposit dispute, so you decline B on those two documented lines, not on a gut feeling. Run the same checks, in the same order, for every applicant: the standard is what makes a denial defensible rather than a guess.
Why it matters to a small landlord
One bad placement can erase a year of cash flow. A tenant who stops paying takes months to remove, and the make-ready, lost rent, and re-list can run past a full month of income, which is why turnover is so expensive and why the front-end screen earns its keep. Screening is also where fair housing law bites hardest: the credit and background standards you set must apply to everyone identically, and credit or background reports pull you under federal consumer-reporting rules that govern consent and the notice you owe an applicant you reject. The cheapest part of the whole system is calling the last landlord, so know which questions to ask a previous landlord and which answers are red flags.
Screening does not end at approval. A thin applicant can still qualify with a guarantor who signs on, and when you rent to roommates, joint and several liability decides whether one person's missed share is everyone's problem on paper. Throughout, the Fair Housing Act sets the floor: a written standard, applied the same way every time, is what keeps a sound business decision from looking like a discriminatory one.
This is general background, not legal advice. Federal consumer-reporting rules and state screening laws govern how you pull reports, what you may charge, and the notice you owe a rejected applicant, so read your state statute or ask a local attorney before you set your criteria.