Cash Flow Management Solutions That Keep Your Bank Balance Healthy

A live 13-week view of your bank balance, so you always know payroll, VAT and tax will clear.

Most businesses that fail are not losing money. They run out of cash at the wrong moment. Good cash flow management closes that gap. We give your small business a rolling 13-week forecast, money set aside for every tax bill, and the few levers that ease a squeeze before it starts. These cash flow management services come from one named, qualified accountant on a fixed monthly fee, so you always know what is coming in, what is going out, and how much you can safely take home.

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Laptop showing a financial dashboard

Why am I profitable but always short of cash?

This is the question we hear most. Profit is what you earn on paper. Cash is what is actually in the bank today. The two drift apart for simple reasons. A customer pays late, so the sale is booked but the money has not landed. You buy stock now and sell it in three months. A VAT or tax bill builds up in the background while your profit looks healthy.

That is the gap we close. We show you the money side of the business, week by week: the cash coming in, the cash going out, and the difference between them (your net cash flow). A healthy profit never turns into an empty account. The tool that does it is a rolling 13-week forecast, and it is built around three numbers:

  • Your lowest projected balance over the next 13 weeks. This is the single most important number. It tells you whether payroll, rent and tax all clear without you lifting a finger.
  • Your cash conversion cycle. This is the number of days between paying money out and getting it back from customers. The shorter it is, the more cash sits in your account.
  • Your runway. This is how many months your cash will last at the current rate. It matters most if your income is seasonal or lumpy.

These cash flow management solutions are not complicated. They just need to be kept up to date, which is the part we take off your plate.

Our expertise covers

Everything in this service, in one bill.

  • 01

    A live 13-week cash forecast

    We build a rolling 13-week forecast inside Xero, QuickBooks, FreeAgent or Sage. It maps every payment in and out, week by week. You see your lowest point before it arrives, not the morning it bites.

  • 02

    Money set aside for every tax bill

    We work out what you will owe for VAT, Corporation Tax, PAYE and Self Assessment, and ring-fence the cash on the real due dates. When HMRC asks, the money is already there. No scramble, no emergency loan.

  • 03

    Faster cash from work you have already done

    We shorten the gap between paying out and getting paid. That means clear payment terms, watching your debtor days (how long customers take to pay you), polite chasing, a small discount for early payment where it helps, and using supplier credit on purpose. It frees up cash that is already yours but stuck.

  • 04

    A safe answer before you spend

    Before you hire, buy stock or take a big order, we model it. Best case, worst case, and a realistic middle, each shown against your forecast. You decide on numbers, not hope.

  • 05

    A plan when cash is tight

    If the forecast shows a gap, we act early. That can mean an instalment deal with HMRC (called Time to Pay), an overdraft or invoice finance (sometimes called invoice factoring), or better supplier terms. Early action keeps you in control.

How do I know if my business has a cash flow problem?

Cash flow problems are quiet. They build up until a payment is due and the money is not there. You might have one if:

  • You dip into an overdraft or your own savings to cover normal monthly costs.
  • Suppliers are chasing you, or you quietly delay paying them to get through the month.
  • Your accounts show a profit, but there is never much cash in the bank.
  • A VAT or tax bill catches you out and you scramble to find the money.
  • You want to hire or buy stock, but you are not sure the cash will be there.

If any of these feel familiar, you are not alone, and they are all fixable. This is what cash flow management services do: they turn these blind spots into early warnings you can act on weeks ahead.

Why it pays off

What you actually get.

  • You stop being blindsided by tax

    We set money aside for VAT, Corporation Tax, PAYE and Self Assessment on their real due dates, so the cash is ready before the bill lands. No late-payment interest, no panic.

  • One accountant who knows your numbers

    You deal with a single named, qualified accountant (ACMA, CGMA, ACCA or FCCA), not a call-centre queue. They know your forecast and your busy season, and reply within 72 hours.

  • Fixed monthly price, no surprises

    Our cash flow management services sit inside a fixed monthly fee of £129, £250 or £499, billed monthly. You can move up or down as you grow, and picking up the phone never costs you extra.

  • Decisions on this week's numbers

    We work live inside your accounting software, so the forecast shows this week, not last quarter. When a big decision comes up, the real figure is in front of you.

  • Risk-free to try

    Every plan comes with a 30-day money-back guarantee. If the first month does not earn its keep, you do not pay for it.

A real example: a seasonal online seller

Take an online seller turning over £1.2 million a year. Sales peak in November and December. To be ready, they spend £80,000 on stock in September and October. That money goes out weeks before the sales come in.

On paper, they are having a great year. The 13-week forecast tells a different story. It shows the bank balance dropping to £6,000 in late October, just as a £25,000 VAT bill falls due. That low point is the lowest projected balance, and it is a problem.

Because they can see it in August, they have time and choices. They order slightly less stock, agree 60-day terms with one supplier, and move VAT onto a scheme that softens the quarterly hit. The low point lifts to a safe level. The crisis simply never happens.

How do we set this up?

Setting up our cash flow management services takes about a week, and most of the work is ours.

  1. You give us read-only access to your bank feed and accounting software, plus your latest lists of who owes you and who you owe.
  2. We build your first 13-week forecast and walk through it with you live, in plain English.
  3. We agree your comfort buffer and the levers that fit your business, from payment terms to tax timing.
  4. From then on the forecast updates every week, and we flag anything that needs action before it bites.

Customers pay late and wreck my month. What can I do, and what can I charge?

Late payment is the biggest cause of cash flow stress for small firms. The work is done, you have paid your costs, and the money just has not arrived. The fix is part habit and part law, and we build both into your routine.

If you have not agreed a payment date with a business customer, the law treats a payment as late 30 days after they get the invoice or you deliver, whichever is later. Once it is late, you can charge statutory interest of 8% plus the Bank of England base rate. With the base rate at 3.75% (June 2026, GOV.UK), that is 11.75% a year on the overdue amount.

You can also claim a fixed sum towards your costs: £40 for a debt under £1,000, £70 for £1,000 to £9,999.99, and £100 for £10,000 or more, plus reasonable recovery costs on top.

In truth, the goal is rarely to charge the interest. It is to have it written into your terms so people pay on time. We set sensible terms, send reminders before and after the due date, and keep the legal remedies for the accounts that really need them. If chasing is eating your week, our credit control service runs the whole cycle for you.

See also: UK invoice requirements explainedHow to invoice as a sole traderCredit control services

Can I spread my VAT or tax bill?

Yes, and there are two ways. One smooths a lumpy bill before it ever becomes a crisis, by changing how you pay VAT. The other is an instalment deal with HMRC for a bill that is already due. We use the first to prevent squeezes and the second only as a planned fallback.

To smooth VAT, the Annual Accounting Scheme is open to businesses with VAT taxable turnover of £1.35 million or less. Instead of four quarterly bills, you make steady advance payments through the year and settle up once. A lumpy quarterly hit becomes a calm monthly one your forecast can absorb.

If a bill is already due and the cash will not stretch, HMRC may agree a Time to Pay arrangement, which simply means paying in instalments. Interest still runs on what you owe, at the HMRC late-payment rate of the base rate plus 4%, currently 7.75% (June 2026, GOV.UK). So it buys time and calm, but it is not free. We test the plan against your forecast first, so you only promise instalments you can actually meet.

Seeing a shortfall in the next quarter? The time to act is now, while you still have options.

Way to spread the billWho it suitsWhat it does to your cash
VAT Annual Accounting SchemeVAT taxable turnover £1.35m or lessSwaps four lumpy quarterly bills for steady advance payments and one settle-up. Smooths cash.
VAT Cash Accounting SchemeVAT taxable turnover £1.35m or lessYou pay VAT only after your customer pays you. Protects cash when people pay slowly.
HMRC Time to PayAny business that cannot pay a bill in fullSpreads VAT, Corporation Tax, PAYE or Self Assessment over instalments. Interest still adds up at 7.75%.

See also: VAT Cash Accounting Scheme explainedHMRC Time to Pay for Self AssessmentHMRC interest and penalties on late paymentBook a free Tax Health Check

What cash flow numbers should a small business watch?

Three numbers tell you almost everything. Most owners only watch the bank balance, which is the least useful, because it only shows the past.

First, your lowest projected balance over the next 13 weeks. This tells you whether payroll, rent and tax all clear on their own. If it dips below your comfort level, you get weeks of warning, not a nasty morning surprise.

Second, your cash conversion cycle, the days between paying out and getting paid. It has three parts: how fast customers pay you (your debtor days, sometimes called days sales outstanding), how long you take to pay suppliers (creditor days), and how long stock sits before it sells (stock days). Chasing invoices sooner, taking fair supplier credit, and holding less idle stock all shorten it and release cash that is already yours but locked up.

Third, your runway, how many months you can keep going at the current rate. This matters most for seasonal businesses with lumpy income. We track all three live in your software, so the numbers are about this week, not last quarter.

See also: Startup runway and burn-rate forecastingKPIs and management accountsBank reconciliation for small business

How much cash should I keep back, and how much can I safely take out?

Two questions, one answer: let the forecast decide, not your gut. You keep a buffer, then take what is left once tax is set aside.

For the buffer, a useful rule of thumb is enough cash to cover your fixed costs for a few weeks to a few months. A steady business can hold less. A seasonal seller needs more, because the quiet months still have bills to pay.

For what you take out, the safe figure is what remains after you have set money aside for VAT, Corporation Tax and your own Self Assessment, and after your buffer is topped up. We show you that number each month, so a wage or dividend never quietly tips you into the red.

Is cash flow management consultancy worth paying for?

Fair question. Here are honest answers to the doubts owners usually have about cash flow management services.

  • Can I just do a spreadsheet? You can, and some owners do. The catch is that a spreadsheet is only as fresh as the last time you touched it, and it does not warn you when a number changes. We keep the forecast live and tell you when something needs action.
  • Is it worth the money? Good cash flow management services pay for themselves the first time they stop a missed tax bill, a bounced payment, or a panic loan. Most owners say the bigger win is sleeping better.
  • Will an accountant lecture me? No. We are on your side. We explain things in plain English and help you decide. We do not tell you off.
  • Is my business too small? No. The squeeze is tightest for smaller firms, so this is where cash flow management for a small business helps most. We work with owner-managed companies, ecommerce and retail sellers, and startups from around £150,000 turnover up.
  • What does it cost, and am I locked in? A fixed monthly fee of £129, £250 or £499, billed monthly, so you are never tied in. And there is a 30-day money-back guarantee if the first month does not earn its keep.

Ready to see your next 13 weeks?

If you are tired of guessing whether next month will clear, that is exactly what we fix. Book a free Tax Health Check. We will look at your numbers, show you your lowest projected balance, your cash conversion cycle and your runway, and tell you the one or two levers that will help most. No jargon, no hard sell.

It is the simplest way to see what our cash flow management services can do for your business.

This page is general guidance, not personal advice. Every business is different, so book a call before you act on anything here.

See also: Book a free Tax Health Check

How we deliver

Four steps from first call to filed.

  • 01

    Discovery

    Understanding your business needs.

  • 02

    Solution Design

    Crafting your custom accounting strategy.

  • 03

    Onboarding

    Quick and easy integration.

  • 04

    Regular Rhythm

    Consistent monitoring and reporting.

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Common questions

Frequently asked questions.

Our cash flow management plans sit inside a fixed monthly fee of £129, £250 or £499, billed monthly with no surprise hourly charges. The right plan depends on the size and complexity of your business, and we confirm the price with you before you commit to anything. There is also a 30-day money-back guarantee, so the first month is risk-free.

Yes, and it happens more often than owners expect. Profit is what you earn on paper. Cash is what is actually in your account today. You can be profitable but short if customers pay late, money is tied up in stock, or a big tax bill lands before your invoices are paid. A 13-week forecast is built to catch that gap, so a profit on the books never becomes an empty bank account.

Thirteen weeks is far enough ahead to spot a cash squeeze, but close enough to still do something about it. You get time to chase a slow payer, delay a purchase, or arrange a facility before the low point hits. A yearly forecast is too broad to catch a payroll squeeze, and a monthly one lags the weekly rhythm most small businesses run on. The 13-week forecast is the same tool used by lenders and turnaround experts.

Just read-only access to your bank feed, your accounting software (Xero, QuickBooks, FreeAgent or Sage), and your latest lists of who owes you and who you owe. We build the first forecast within your first week and walk through it with you live. After that it updates every week on its own.

We start the same week. We map every payment you have coming up against the money you expect in for the next six weeks. We sort the bills that must be paid, like PAYE, VAT and pensions, from the ones that can wait. Then we open calm conversations with key suppliers and, if it helps, set up a Time to Pay instalment deal with HMRC. This is part of your normal plan, not billed as an emergency extra.

We build your busy and quiet seasons into the forecast: the stock you buy before a peak, when deposits land, and the cash dip that often follows a busy spell. We check it against your last two years of bank statements, so the plan reflects what really happens, not a best-case guess.

Yes. We use the layout banks and lenders expect: opening balance, money in and money out each week by type, and the closing balance. The same pack supports overdraft renewals and most loan or invoice-finance applications without extra work.

Software like Xero and QuickBooks is great at showing what has already happened. It will not tell you whether you can afford next quarter's wages or your next VAT bill. Cash flow management is the layer on top. We take the numbers from the software you already use, build a forward view, and tell you what to do about it. You keep your software, we turn its data into decisions.

Word of mouth

What clients actually say.

  1. I’ve had an excellent experience working with Zmartly. Harvey and the team are professional, responsive, and genuinely supportive. They explain things clearly, stay on top of deadlines, and always look for practical ways to save tax and improve…
    Google reviewer land4 success (chill feel good)
    land4 success (chill feel good)Verified Google review · 6 months ago
  2. I’ve used several accountants in the past, but hands down there is no one better than Harvey at Zmartly. He really understands exactly what advice you’re looking for and explains everything clearly and professionally. Nothing ever feels rushed…
    Google reviewer Heena
    HeenaVerified Google review · 4 months ago
  3. I started working with Zmartly Accountants after having serious issues with my previous accounting firm. They were missing deadlines, incorrectly calculating VAT, constantly late, and extremely difficult and frustrating to communicate with. Switching to Zmartly was a huge…
    Google reviewer Jorge Carballo Gomez
    Jorge Carballo GomezVerified Google review · 5 months ago
  4. I've had a terrible experience with multiple accountants. Zmartly have been incredible. If you do ecommerce / Amazon FBA you definitely need to go with someone who understands the complexities with it. Thanks to Harvey and his amazing…
    Google reviewer Sean Barrington
    Sean BarringtonVerified Google review · 6 months ago
  5. Its not easy to find accountants who understand ecommerce especially Amazon and these guys know Amazon very well. Always helps us with advice if they spot something we incorrectly. Super easy to speak with someone if you have…
    Google reviewer Darius Jaselskis
    Darius JaselskisVerified Google review · 6 months ago
  6. I’ve had an excellent experience working with Zmartly. Harvey and the team are professional, responsive, and genuinely supportive. They explain things clearly, stay on top of deadlines, and always look for practical ways to save tax and improve…
    Google reviewer land4 success (chill feel good)
    land4 success (chill feel good)Verified Google review · 6 months ago
  7. I’ve used several accountants in the past, but hands down there is no one better than Harvey at Zmartly. He really understands exactly what advice you’re looking for and explains everything clearly and professionally. Nothing ever feels rushed…
    Google reviewer Heena
    HeenaVerified Google review · 4 months ago
  8. I started working with Zmartly Accountants after having serious issues with my previous accounting firm. They were missing deadlines, incorrectly calculating VAT, constantly late, and extremely difficult and frustrating to communicate with. Switching to Zmartly was a huge…
    Google reviewer Jorge Carballo Gomez
    Jorge Carballo GomezVerified Google review · 5 months ago
  9. I've had a terrible experience with multiple accountants. Zmartly have been incredible. If you do ecommerce / Amazon FBA you definitely need to go with someone who understands the complexities with it. Thanks to Harvey and his amazing…
    Google reviewer Sean Barrington
    Sean BarringtonVerified Google review · 6 months ago
  10. Its not easy to find accountants who understand ecommerce especially Amazon and these guys know Amazon very well. Always helps us with advice if they spot something we incorrectly. Super easy to speak with someone if you have…
    Google reviewer Darius Jaselskis
    Darius JaselskisVerified Google review · 6 months ago
4.9
Google · based on 63 reviews
Zmartly Ltd12 Hammersmith Grove, London W6 7AP020 8175 5145[email protected]
Free · 30 minutes · No obligation

Stop overpaying tax. Start filing in 5 days.

Thirty minutes with a qualified accountant. Most owners uncover £1,000-£3,000 in annual savings on the first call. If we are not the right fit, you walk away with a free tax review on the house.

Google reviewer land4 success (chill feel good)Google reviewer HeenaGoogle reviewer Jorge Carballo GomezGoogle reviewer Sean BarringtonGoogle reviewer Darius Jaselskis
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