How to calculate monthly income from a pay stub

Most leasing teams multiply weekly pay by 4. That undercounts by nearly 8%, every time, and it rejects applicants who actually qualify.

There are 52 weeks in a year, not 48. The correct multiplier is not 4.

The multipliers, and where they come from

The arithmetic is 52 weeks divided by 12 months.

Biweekly and semi-monthly are the pair that get confused, and they are not the same thing. Biweekly means every two weeks, which is 26 paychecks. Semi-monthly means twice a month, which is 24. An applicant paid biweekly receives two extra paychecks a year, and using 2 instead of 2.16 understates their income by 8%.

That 8% is often the difference between qualifying and not.

Gross, not net, and the reason matters

Use gross pay. Every standard rent-to-income calculation is built on gross.

The reason is that net pay reflects elective choices. Two applicants earning identical gross can show very different net depending on 401k contribution, health plan tier, dependent care withholding, and garnishments. Qualifying on net penalizes the applicant who saves for retirement.

The exception is when you are assessing genuine ability to pay rather than applying a policy ratio. A garnishment is not elective and does reduce what is actually available. That is a judgment call about a specific application, not a change to the standard.

Verify with year-to-date, not with one stub

One stub is a snapshot and can be a good week.

YTD gross divided by the number of pay periods elapsed gives you the actual average, including or excluding overtime depending on how you want to treat it. If a single stub shows materially more than the YTD average implies, you are looking at an unusual period rather than a typical one.

This also happens to be the cheapest fraud check available, because YTD figures only go up and forged stubs frequently fail to keep multiple periods internally consistent. We cover the rest of that in how to spot a fake pay stub.

Bank statements and offer letters use different math

Not every applicant hands you a pay stub.

For bank statements, sum the payroll deposits within each statement period rather than annualizing a single deposit. Deposit frequency and consistency tell you more than the largest deposit does, and irregular deposits are the signal worth reading rather than smoothing away.

For offer letters, divide the stated annual salary by 12. Also check the start date, because an offer letter is a claim about future income, not evidence of current income. A statement dated more than three months ago, or a bank statement older than about 35 days, is stale enough that it should be refreshed rather than accepted.

Three cases where the multiplier does not apply

Gig and variable income. A DoorDash driver has no pay frequency. Averaging deposits over a longer window is the only honest approach, and connecting the payroll account directly is better than either.

Cash-paid work. Real, legal, and common in this industry. There is no document that verifies it, and no arithmetic that fixes that. Employer confirmation is the practical route.

Multiple jobs and household income. Sum each earner separately using their own frequency, then combine. Do not average frequencies together, and confirm whether your policy counts a guarantor's income toward the ratio or treats it as a backstop.

2.5x or 3x, and why the answer has to be written down

Once you have monthly income, the ratio decides the outcome. The common thresholds are 2.5x and 3x monthly rent.

There is no industry-correct answer. What matters is that the number is written down, applied identically to every applicant, and consistent with whatever your application platform uses. We have seen a 2.5x rule in one system and a 3x rule in another at the same operator, which produces applicants who pass one gate and fail the next for no defensible reason.

Undocumented, inconsistently applied income standards are also fair housing exposure. "This one looked fine to me" is not a policy, and it is not defensible when somebody asks why two similar applicants got different answers.

The stronger move is not to do this arithmetic at all

Everything above assumes you are working from a document the applicant chose to give you.

Connecting the applicant's bank or payroll account directly means the income figure comes from the institution rather than from a page. There is nothing to calculate and nothing to forge. ProofUp does that through Plaid, and falls back to document analysis for applicants who cannot or will not link.

For the ResProp portfolio, verifying income at the source rather than from documents cut delinquency 50% and evictions 24%. Applicants approved without verified income went delinquent 4 times more often.

Which multiplier is your team using this week?