Profit vs Cash Flow: Why Profitable SMEs Run Out of Money (And How to Fix It)

Accounting support for limited companies and growing SMEs can start from £300 inc VAT, depending on the services your business needs.

It is possible for your company to make a profit and still struggle to pay suppliers, staff or HMRC. That is because profit and cash flow measure different things.

Profit tells you whether your business model is working. Cash flow tells you whether there is enough money in the bank to meet your commitments today.

For a growing limited company, understanding the difference can help you avoid an unpleasant surprise: healthy accounts on paper, but an empty business bank account.

Profit and cash flow: what is the difference?

Profit is usually shown on your company’s profit and loss report. It is broadly the income your business has earned, less the costs it has incurred during a period.

Cash flow tracks the money actually moving into and out of your bank account.

The two figures can be different because:

• You may raise an invoice before the customer pays it.
• You may buy stock or equipment before generating sales from it.
• You may owe VAT or Corporation Tax before the payment date arrives.
• You may repay a loan or take money from the company without those payments appearing as normal business expenses.
• You may pay suppliers before customers settle their invoices.

This timing difference is the main reason a profitable SME can run out of money.

Why profitable limited companies run out of cash

1. Customers pay after you have recorded the sale

Suppose your company completes £20,000 of work in September and sends an invoice with 30-day payment terms.

That sale may appear in your September figures. However, the cash may not arrive until October. If the customer pays late, the gap becomes even longer.

During that time, your company may still need to pay:

• Employee wages
• Rent and business rates
• Suppliers
• Software subscriptions
• Loan repayments
• VAT
• Corporation Tax
• Professional fees

Your profit has been recorded, but the cash is still sitting in your customer’s bank account.

If several customers pay late at the same time, your business may effectively be financing their operations.

2. Growth can consume cash

Growth is positive, but it often requires cash before it produces more cash.

A growing company may need to:

• Buy additional stock
• Hire employees
• Increase marketing spend
• Move to larger premises
• Purchase equipment
• Offer customers longer payment terms
• Pay deposits to suppliers

The company may be making a healthy margin on each sale, but it needs money to fund the period between paying for resources and collecting customer receipts.

This is why fast-growing businesses can experience cash pressure even when sales and profits are rising.

3. Tax bills arrive in large amounts

Tax is one of the most common causes of cash-flow pressure for profitable limited companies.

Corporation Tax is based on taxable company profits, not simply the amount currently sitting in your bank account. If you have used your available cash to fund growth, pay suppliers or buy equipment, you may still have a Corporation Tax bill to settle later.

VAT can create a similar problem. Under standard VAT accounting, VAT may become payable based on invoices rather than the date your customer actually pays. A slow-paying customer can therefore leave your company waiting for cash while the VAT liability continues to build.

A sensible approach is to include VAT and Corporation Tax in your cash-flow planning from the start. Consider moving the expected tax amounts into a separate reserve account so that the money is not accidentally spent on day-to-day costs.

For a wider overview, read our guide to small business tax services.

4. Loan repayments reduce cash

Loan repayments can be confusing because the full payment does not normally appear as a business expense in your profit and loss account.

The interest may be recorded as a cost, but the repayment of the loan balance reduces your bank account without reducing profit in the same way.

If your company has borrowed money to fund equipment, premises or expansion, make sure the full repayment schedule appears in your cash-flow forecast.

5. Dividends and drawings are taken from cash

Dividends are paid from company profits, but they also reduce the cash available to your limited company.

A company director should not base dividend decisions only on the profit shown in management accounts. The company must also be able to meet its existing and upcoming liabilities.

Before taking money from the company, consider:

• The current bank balance
• Unpaid supplier invoices
• Payroll commitments
• VAT due
• Corporation Tax due
• Loan repayments
• Expected customer receipts
• Planned investment

A profitable month does not always mean that money is available to withdraw.

How to build a useful cash-flow forecast

A cash-flow forecast does not need to be complicated. A simple rolling forecast can give you an early warning when money may become tight.

Many limited companies use a 13-week cash-flow forecast. This gives you a practical view of the next three months while keeping the assumptions realistic.

Start with your current bank balance. Then list the money you expect to come in and go out each week.

Include realistic cash coming in

List expected receipts from:

• Unpaid customer invoices
• New work already agreed
• Deposits and staged payments
• Grants or finance
• Other company income

Do not automatically use the invoice due date. Review how your customers actually pay. If a customer usually pays 15 days late, build that delay into the forecast.

It is safer to forecast cash based on realistic payment behaviour rather than optimistic assumptions.

Include every important payment

Your forecast should show:

• Payroll and employer costs
• Supplier payments
• Rent and utilities
• VAT payments
• Corporation Tax
• PAYE and pension payments
• Loan repayments
• Insurance renewals
• Planned equipment purchases
• Dividends or other payments to directors

The purpose is not to predict the future perfectly. It is to identify possible pressure points early enough to take action.

Update it every week

Compare the forecast with what actually happened.

Did a customer pay later than expected? Did a supplier invoice arrive earlier? Did costs increase? Update the forecast and add another week at the end.

This rolling approach gives you a clearer view of your likely closing bank balance and helps prevent cash problems from appearing suddenly.

Five practical ways to improve cash flow

1. Invoice promptly

Raise invoices as soon as the work is completed or the goods are delivered. A delay in sending an invoice is also a delay in receiving payment.

Make sure every invoice includes the correct purchase order number, payment details and agreed terms. Errors can give customers a reason to delay payment.

2. Chase overdue invoices consistently

Use a clear process rather than waiting until the business bank account becomes uncomfortable.

You could:

• Send a reminder before the due date
• Follow up shortly after the due date
• Telephone customers with larger overdue balances
• Review your aged debtor report every week
• Escalate long-overdue accounts promptly

For larger projects, consider deposits or staged payments so your company is not funding the full cost of delivery.

3. Review customer and supplier terms

If customers pay in 60 days but suppliers require payment in 14 days, your business is carrying the cash-flow gap.

Where appropriate, consider negotiating:

• Deposits from customers
• Milestone billing
• Shorter customer payment terms
• Longer supplier payment terms
• Payment plans for large purchases

Terms should be commercially sensible and clearly agreed in writing.

4. Keep tax reserves separate

Do not treat VAT or Corporation Tax money as spare working capital.

A separate reserve account can make tax liabilities more visible. Add expected payment dates to your forecast and review the reserve whenever sales or profit expectations change.

5. Get support before the problem becomes urgent

If your forecast shows that the company may struggle to cover payroll, tax or key supplier payments, act early.

A limited company accountant may be able to help you review:

• Debtor collection
• Pricing and margins
• Tax reserves
• Payment terms
• Stock levels
• Borrowing requirements
• Planned investment
• Director payments

You can find a limited company accountant with experience supporting growing businesses.

When should you look for an accountant near me?

Searching for an accountant near me can be useful when you want local meetings, regular support or someone familiar with businesses in your area. However, location should not be the only factor.

When comparing accounting services for SMEs or searching for local accountants near me, check whether the accountant understands:

• Limited company accounts
• Corporation Tax
• VAT
• Payroll
• Cash-flow forecasting
• Management accounts
• Director remuneration
• Business growth

Some companies prefer a local adviser, while others are comfortable working with an online accountant through cloud software and video meetings.

Accountant Search is a curated directory and digital matchmaking/referral platform, not an accountancy practice. You provide details about your company and the support you need, and the platform can help identify suitable accountant introductions for you to consider.

Start by using the Find an Accountant service.

Self-Assessment tick-box for company directors

Your company’s Corporation Tax return is separate from your personal Self Assessment tax return.

A director may need Self Assessment support because of dividends, property income, benefits, savings income or other personal tax matters. This is different from looking for tax returns for self employed, which usually relates to separate self-employed income outside the limited company.

Self-Assessment tick-box: If you are a limited-company director and need personal tax support, tick the Self Assessment option when completing the SA registration form. Include details of dividends, other income and any previous Self Assessment obligations so that suitable support can be identified.

For deadline information only, check the current Self Assessment deadline guidance.

Final thoughts

Profit is important, but it does not pay the bills by itself. Your limited company needs enough cash, at the right time, to pay employees, suppliers, HMRC and other creditors.

The most effective safeguards are simple:

1. Understand the difference between profit and cash flow.
2. Forecast cash receipts based on realistic payment dates.
3. Include VAT, Corporation Tax and loan repayments in the forecast.
4. Chase overdue invoices consistently.
5. Review your cash position every week.
6. Get professional support before a shortfall becomes urgent.

If you want to build stronger financial routines across the year, read our related guide on small business tax services and year-round tax planning.

Frequently asked questions

Can a limited company be profitable but have no cash?

Yes. Profit may be tied up in unpaid invoices, stock or equipment. Tax bills, loan repayments and dividends can also reduce cash without appearing as ordinary costs in the same way.

How often should a growing SME update its cash-flow forecast?

A growing or cash-sensitive company should review its forecast at least weekly. A rolling 13-week forecast is a useful practical starting point.

Should VAT be included in a cash-flow forecast?

Yes. VAT should be included on the date you expect the payment to leave the company’s bank account. The same applies to Corporation Tax, payroll taxes and other major obligations.

Can an accountant help with cash-flow forecasting?

Many accountants supporting limited companies offer cash-flow forecasting, management accounts and financial planning. Ask what is included before agreeing to a package from an accountant near me.