The short answer
What NSFs and negative days are
An NSF happens when a payment hits your account and there is not enough money to cover it. The bank returns it or pays it and charges a fee. A negative day is any day your account closes below zero, even if no payment bounced.
Funders count both on your recent bank statements. They also look at when they happen, whether they cluster around payroll or rent, and whether they are getting more or less frequent.
How many is too many
There is no single number used everywhere, but a rough way to think about it:
| Pattern over 3 months | How it usually reads |
|---|---|
| 0 to 2 NSFs, few negative days | Generally workable, especially with a clear reason |
| 3 to 6 NSFs | Lower amounts or shorter terms are likely |
| Several every month, many negative days | Often declined until the account stabilizes |
This is general guidance, not an MFE approval rule. MFE's NSF guide covers how they are viewed in a review.
Check what your business qualifies for
Merchant Fund Express reviews do nsfs disqualify you from business funding requests from $5,000 to $5,000,000. Scores from 500 are considered, and same-day decisions are common on complete files.
Check funding options with Merchant Fund ExpressWho this affects most
Owners with thin balances who pay large bills on the same day each month, businesses with existing advance debits, and seasonal businesses in their slow months tend to show the most NSFs.
A business with one or two NSFs caused by a late customer payment and a strong balance the rest of the month is in a different spot than one overdrawn every week. If your average balance is also low, read minimum average bank balance.
Illustrative example: cleaning up before applying
Assumptions: an auto repair shop with about $40,000 a month in deposits had five NSFs last quarter, each costing a $35 bank fee. The owner moves bill dates away from the weekly payroll, keeps a $3,000 floor, and applies after two clean months. Advance of $30,000, factor 1.38, 3% fee, daily payment over 150 business days.
| Item | Amount |
|---|---|
| NSF fees paid last quarter (5 x $35) | $175 |
| Advance amount | $30,000 |
| Fee (3%) | $900 |
| Net cash received | $29,100 |
| Total repayment ($30,000 x 1.38) | $41,400 |
| Daily payment ($41,400 / 150) | $276 |
Illustrative example only. Adding $276 a day to an account that was already overdrawing would likely cause more NSFs. That is exactly why a funder cares, and why fixing timing first helps both the offer and the business.
These figures are illustrations, not offers. Real pricing, amounts and terms depend on the full file.
Funding brings customers. Is your website ready for them?
NSFs often come from uneven weeks, and steadier bookings smooth those out. Cheap Cheap Websites builds professional sites from $399 with online booking or request forms, and Website Care at $30/month keeps them running, so more customers book ahead instead of the calendar emptying out.
How to clean up your statements
- Move automatic bills so they do not all land on the same day as payroll.
- Set a low-balance alert well above zero.
- Turn on overdraft protection from a linked savings account, if your bank offers it.
- Deposit cash sales daily instead of weekly.
- Ask slow-paying customers for shorter terms or card payment.
- Wait for one to two clean months before applying, since the most recent statements weigh most.
What to prepare
- 3 to 4 months of business bank statements, every page.
- A short note explaining any NSF with a one-time cause.
- Government ID and a voided business check.
- A short application.
When another option or waiting is better
If NSFs come from existing advance debits, a new advance may make things worse. Look at whether refinancing an existing advance would lower the daily load instead. If NSFs come from slow-paying business customers, invoice factoring may fit better. And if the account has been overdrawn most of the last month, waiting until it stabilizes is usually the better move.
Related funding guides
Cheap Cheap Websites builds websites. It does not lend or make funding decisions. Funding is offered by our funding partner, Merchant Fund Express, and every request is subject to its review and approval. Figures on this page are illustrations, not offers. Updated October 15, 2026.