A bank statement loan treats seasonal income by averaging every month in the lookback, busy and quiet alike, so a full cycle sets the monthly figure. A 12 or 24 month window captures it. Lenders discount seasonal income when the slow months show losses, when the season is shrinking or when the statements cover only part of the year.
How does a bank statement loan average seasonal income?
A bank statement loan averages seasonal income the same way it averages any income: qualifying deposits for the whole lookback, after exclusions and the expense factor, divided by the number of months. The busy months lift the total. The slow months pull it back. The quotient is what the borrower earns in an ordinary month across the year.
Seasonal income is money that follows the calendar. A landscaper earns in summer, a tax preparer in spring, a ski instructor in winter and a retailer in the weeks before the holidays. The pattern repeats each year. What matters to the lender is that it repeats, because a cycle that repeats can be averaged with some confidence.
Why the full cycle is the unit
An average taken over part of the cycle is misleading in either direction. Six busy months make the borrower look far richer than they are. Six slow months make them look unable to pay. Only a span that holds every season once, or twice, gives a number that matches what the household lives on.
The mortgage payment does not have seasons
The borrower pays the same housing payment in January as in July. A lender cares whether the yearly income covers twelve equal payments, and whether the borrower can carry the payment through the slow stretch. The average answers the first question. The account balances in the slow months answer the second.
Lookback length for a full seasonal income cycle
The lookback is the number of months of statements a lender reads, and for seasonal income it should be 12 or 24 so that every season appears in full. A 12 month window holds one cycle. A 24 month window holds two and lets the lender compare them. Shorter windows cannot average a seasonal business fairly.
12 months
A 12 month lookback is enough to see the whole year once. It suits a seasonal business that is growing, because the most recent cycle is the strongest one. The weakness is that one cycle could be unusual. A wet summer or an early winter shows up as a low year with nothing to compare it to.
24 months
A 24 month lookback shows two cycles side by side. A lender can check that the peak arrives in the same months and reaches a similar level. If the second cycle is lower, the average falls and the lender may ask why. If it is higher, the average lags the borrower's current earnings, which is the cost of the extra certainty.
Programs with shorter windows
Some programs accept fewer months of statements for certain borrowers. For a seasonal business, a short window is a poor fit. A broker who sees a seasonal pattern should place the file with a program that reads at least 12 months, or expect the lender to ask for more statements anyway. How to calculate annual income from bank statements covers how lenders annualize a period shorter than a year, and why that is risky with a seasonal pattern.
A landscaper's seasonal deposits month by month
A worked example shows how far the average moves depending on which months are counted. The borrower below is a fictional landscaper with a business account. All figures are qualifying deposits after transfers and one-time credits came out. They are invented for illustration, and the 40 percent expense factor is an example only.
| Month | Example qualifying deposits |
|---|---|
| January | $3,000 |
| February | $3,500 |
| March | $9,000 |
| April | $18,000 |
| May | $24,000 |
| June | $26,000 |
| July | $25,000 |
| August | $23,000 |
| September | $17,000 |
| October | $12,000 |
| November | $6,000 |
| December | $3,500 |
| 12 month total | $170,000 |
Three averages from the same year
- Full 12 months. $170,000 divided by 12 is about $14,167 a month in deposits. After a 40 percent expense factor, monthly income is $8,500.
- April through September only. $133,000 over six months is about $22,167 a month. After the factor, about $13,300. That figure overstates income by more than half.
- October through March only. $37,000 over six months is about $6,167 a month. After the factor, about $3,700. That figure understates income by more than half.
The 12 month figure is the only one a lender would accept. The other two show why a broker should never quote a seasonal borrower from a few recent statements.
What the balances add
The deposits are only half the picture. If the landscaper's account balance builds through summer and drifts down through winter without going negative, the business is managing its own cycle. If the balance hits zero every February and the account shows overdraft fees, the slow months are a real risk even though the average looks fine.
Why would a lender discount seasonal income?
A lender discounts seasonal income when the pattern suggests the yearly average will not hold. The usual triggers are a peak that is shrinking, slow months with overdrafts or negative balances, an off-season funded by borrowing, and a cycle too new to judge. The discount may be a lower figure, a longer lookback or a decline.
A shrinking season
When a 24 month lookback shows the second peak well below the first, the lender may use only the lower year, or the lower of the two averages. Fannie Mae's general income guidance says lenders must document that income is stable, has a history of receipt and is reasonably expected to continue. Non-agency lenders apply their own version of that test, and a falling season is the clearest way to fail it.
An off-season run on credit
Some seasonal owners carry the slow months with a business line of credit. Draws show up as deposits. If they are not removed, they inflate the winter months. If they are removed, the winter may show almost nothing, and the line's repayments in summer become a debt. Either way, the lender wants to see it.
A cycle that has not repeated
A business in its first season has no second cycle to compare. A lender may ask for proof of the owner's earlier work in the same trade, or wait until a full year is on the statements. Statements on their own can prove only what they show, which the guide to bank statements as proof of income covers in more detail.
Seasonal income timing traps at application
The timing of the application changes what the most recent statements show, and seasonal files are where this bites hardest. A borrower who applies in the slow months has thin recent deposits. A borrower who applies at the peak has strong ones. Neither changes the 12 month average, but both change how the file reads to an underwriter.
Applying in the off-season
The latest statements show low deposits and a falling balance. An underwriter reading the most recent months first may see a business in trouble. A short note pointing to the same months a year earlier heads that off. A lookback that ends in the slow season also leaves the next peak unseen, so the lender has no proof yet that it will come.
Applying at the peak
Recent statements look excellent. The risk is that a lender asks for updated statements before closing, and those arrive as the season turns down. A file approved in August can look weaker in October. Warn the borrower so the drop is not a surprise.
Two seasonal businesses
Some owners pair a summer business with a winter one, such as landscaping and snow removal. The combined deposits look steady. The lender may still want to see each business on its own, with its own account, ownership and history. Bank statement loans with multiple businesses covers how lenders combine or separate the accounts.
Explaining seasonal income in the loan file
A seasonal file needs a short explanation that names the season, the busy and slow months and how the household manages the slow stretch. The explanation goes with the statements, so the underwriter reads the pattern as expected, not as a warning sign. A month-by-month table makes the point faster than a paragraph.
What to include
- A one-paragraph letter from the borrower describing the business and its season.
- A month-by-month table of qualifying deposits for the whole lookback, with the peak and slow months visible.
- The account's month-end balances, to show the slow months are covered.
- Any line of credit used in the off-season, with its draws and repayments marked.
- For a 24 month lookback, a note comparing the two peaks.
Put it in the report
An underwriting report that lays the months out side by side lets a reviewer see the cycle without rebuilding it from the PDFs. What a bank statement analysis report should contain describes the layout. TrueBankFlow reads 12 or 24 months of statements per account and shows deposits, balances and expenses month by month as a trend, which puts a seasonal pattern in plain view before the file goes out. To try it on a seasonal borrower, get started with TrueBankFlow.