You are busy, invoices are going out, and the bank balance still makes you nervous on the 28th. These are the cash problems behind that feeling, how to tell which one you have, and where to start.
Read the headings first. If one sounds like you, tick the signs underneath that fit your own business. Recognising the problem is the first step, and for some of these it is most of the work.
Is this you?
From our invoice data
The typical invoice is paid 9 days after it is issued; one in ten takes 57 days or longer.
Source: Billbooks invoice data, 8,483 invoices from 112 small businesses, September 2024 to September 2026 (aggregate only, figures shown only where 25+ businesses contribute). See the study
Why it happens
You pay for materials, staff and time now, and your customers pay you weeks later, so growth itself widens the gap.
Is this you?
Why it happens
Money in and money out are never put side by side on a fixed date, so the only signal you get is how the bank account feels.
Is this you?
From our invoice data
About 65% of paid invoices are paid after their due date (6,951 paid invoices, 67 businesses). Most invoices are due on receipt, so almost any payment after the day an invoice is sent counts as late.
Source: Billbooks invoice data, 8,483 invoices from 112 small businesses, September 2024 to September 2026 (aggregate only, figures shown only where 25+ businesses contribute). See the study
Why it happens
Payment terms were never stated clearly, or never enforced, so the client learns that paying late has no cost.
Is this you?
From our invoice data
In 45% of small businesses, one client accounts for half or more of a year's billing (58 businesses).
Source: Billbooks invoice data, 8,483 invoices from 112 small businesses, September 2024 to September 2026 (aggregate only, figures shown only where 25+ businesses contribute). See the study
Why it happens
A large client feels like safety, so there is little pressure to find others until the day it pays late or leaves.
Read next
Is this you?
Why it happens
Tax is owed on money you received months ago, and nothing separates that share from the money you are free to spend.
Read next
Guide coming soon.
Is this you?
Why it happens
With one account for everything, personal and business money blur and nobody notices the business depending on you.
Is this you?
Why it happens
Seasonal and project income is irregular, and spending tends to rise to meet the good months rather than stay at the level of the bad ones.
Is this you?
From our invoice data
Shorter terms bring the money in sooner: invoices due on receipt are paid in 15.9 days on average and Net 30 invoices in 47.2 days, while the share paid by the due date barely changes (39.1% against 42.3%).
Source: Billbooks invoice payment study, 53,095 paid invoices from 180 businesses, 2007 to August 2026. See the study
Why it happens
Due on receipt makes the due date the day the invoice goes out, so almost every payment counts as late, even though these invoices are usually paid faster than ones with longer terms. What hurts is having no date to point to when you chase.
Put in when you do the work and when the money actually lands. The gap between the two is usually the whole story. If late payers are the cause, Billbooks can send the reminders so you are not the one chasing.
Run the cash gap checkMore problems owners run into: pricing and invoicing, books and expenses, selling and leads, mindset and growth, when things go wrong, tools. Or see every problem in one list.