Table of Contents
Why cash flow is not the same as profit
Cash inflows in a dealership: when the money actually arrives
Cash outflows: the payments that strain liquidity the most
How to build a monthly cash forecast step-by-step
The four most common liquidity strains in dealerships
How to use forecasting to make inventory decisions
Early warning indicators
Tools for managing cash flow
Frequently asked questions
Why cash flow is not the same as profit
A dealership selling 20 cars a month can be generating accounting profit and still experience real difficulties paying the following month's payroll. This happens because accounting profit recognises income when the cars are sold, but the money only reaches the bank account when it is collected. And between selling and collecting, there can be days, weeks or even months of difference.
In a used car dealership, the most common gaps are: payments from finance companies arriving 5–10 days after the vehicle is delivered, deposits that do not cover that week's supplier payments, stock purchases from private individuals that are paid in cash but whose cars have not yet been sold, and quarterly VAT returns that fall when cash is at its tightest.
Cash flow is the map of these gaps. Without it, decisions on stock purchases, hiring or investment are made with incomplete information.
Cash inflows in a dealership: when the money actually arrives
Identifying when money actually comes in, not just when a sale is agreed, is the first step towards a useful forecast.
Cash sales. The money arrives on the same day or the immediate days following the vehicle's delivery. This is the most predictable inflow and the one that causes the least cash strain.
Finance sales. The finance company typically transfers the amount to the dealership between 3 and 10 working days after the finance agreement is signed. You must know the usual timeframe of each finance company you work with and factor it into your forecast. A sale closed on the 28th may not be settled until the following month.
Deposits and reservations. These are immediate but partial inflows. They only cover between 5% and 15% of the vehicle's price. They cannot be treated as if they were the full payment.
Finance commissions. These are settled on a variable schedule (monthly, fortnightly or per transaction). It is vital to know each provider's calendar to factor them correctly into the forecast.
Warranties and extra services. If you sell third-party warranties, the payout of the commission follows the provider's payment cycle. If you offer an in-house warranty, there is no separate cash inflow (it is included in the vehicle price).
Cash outflows: the payments that strain liquidity the most
Stock purchasing. This is the largest expenditure and the one most dependent on day-to-day decisions. Buying from a private individual means paying in cash on the spot. Buying at auction means paying in the days following the winning bid. Capital tied up in unsold cars is cash tied up.
Preparation expenses. Workshops, valeting, photographers, MOTs. These are small outlays per vehicle but they build up. For a dealership with 15–20 new arrivals of stock a month, these can add up to between £5,000 and £15,000 monthly.
Rent and utilities. Predictable, fixed monthly payments. They form the foundation of your fixed overheads budget.
Payroll and Social Security. Payroll is normally paid on the last working day of the month or the first day of the following month. Social security and pension contributions are paid early in the following month. These are non-negotiable commitments that must always be covered.
Quarterly VAT. This is the outflow that catches out dealerships that fail to plan for it. In the submission months, the net VAT payment can be significant depending on the quarter's sales volume. For a dealership with healthy sales, it can easily equal several weeks of operating expenses.
Refunding deposits. If a deal falls through, you must return the deposit. Although not a regular occurrence, it should be accounted for in the forecast.
To understand how quarterly VAT affects cash flow according to the regime applied to each transaction, you can consult our guide on when to invoice with VAT and when to apply the Second Hand Margin Scheme (REBU).
How to build a monthly cash forecast step-by-step
A cash forecast does not need to be sophisticated to be useful. The goal is to obtain a 4-to-8-week view of what is going out and coming in, with enough detail to anticipate bottlenecks.
Step 1: Estimate forecast sales for the month. Based on available stock, historical sales for the same period in previous years, and current market pace, estimate how many cars you will sell and at what average price. Do not use the list price: use the realistic selling price.
Step 2: Convert sales into receipts. For every predicted sale, estimate when the money will hit your bank account. Cash sale: same day. Finance sale: add 5–10 days. Reservation deposit: immediate, but only the deposit percentage.
Step 3: List all outflows for the month. Group them into fixed (rent, salaries, insurance, software subscriptions) and variable (planned stock purchases, vehicle preparation, marketing). Include quarterly tax payments if it is a VAT submission month.
Step 4: Calculate the net balance week by week. A monthly forecast is far more useful broken down by week. Knowing that you will finish the month in profit does not stop you from causing an overdraft in week two if your sales are concentrated at the end of the month.
Step 5: Spot periods of pressure and act early. If the forecast shows a negative balance in week 2, you have time to chase a payment, postpone a stock purchase, or draw on a business loan. If you only spot it once it has happened, your options are fewer and more expensive.
The four most common liquidity strains in dealerships
Aged stock. Every car that sits for more than 60–90 days is tied-up capital that is not generating cash. A dealership with 5 cars parked up for more than three months could have £50,000–£80,000 locked away. Stock turn is not just a sales metric: it is a liquidity metric. To measure and improve your turnover times, you can consult our article on how to reduce used stock turnaround times.
Purchasing outpaces sales. Buying more stock than you can sell in the coming month ties up cash before you have the revenue to offset it. Stock purchasing must be synchronised with your sales forecast and current cash position.
Unprovisioned quarterly VAT. If a dealership does not put aside a portion of its sales revenue monthly for the quarterly VAT return, that payment descends as a nasty surprise that drains cash at the worst possible moment. The solution is to calculate your estimated net VAT monthly and move this amount into a separate account.
Mismatches between paying for purchases and collecting sales. If you pay for stock in cash on the spot but your sales receipts are delayed (finance companies, customers paying only on collection), there is a structural gap that compounds. Knowing your average gap allows you to correctly estimate your required working capital.
How to use forecasting to make inventory decisions
Cash forecasting is not just a bookkeeping exercise: it is a decision-making tool. Here are the decisions that improve when backed by an up-to-date forecast:
When to buy and how much. If your forecast shows three consecutive weeks of tight cash, it is not the moment to buy three cars at auction that require immediate payment. If the forecast shows a month of strong inflows, you can be more aggressive with your acquisitions.
Which cars to discount. Vehicles with high days-in-stock should be evaluated not just on their margin but on their opportunity cost: every week they sit on the forecourt is money that is not circulating. A discount that speeds up a sale can do more for your cash position than waiting out for the perfect price.
Whether to accept finance providers with longer settlement times. If a new finance company offers better commission rates but pays out in 15 days instead of 5, the cash flow impact is very real and must be assessed before signing up.
To see how profitability and stock turn KPIs connect with financial management in a dealership, you can view the article on the KPIs every car dealership should measure.
Early warning indicators
These are the indicators that, upon deteriorating, warn of cash flow issues before they show up on your bank statement:
Average days in stock. If this climbs steadily above 60–70 days, your tied-up capital is growing.
Fixed cost coverage ratio. How many months of fixed overheads your available cash would cover if sales stopped completely. Below 1.5 months, your position is fragile.
Finance penetration rate. The higher the percentage of finance sales, the higher the timing gap between sale and cash. If this rises significantly, your required working capital also rises.
Quarterly VAT trend. If your liability grows quarter-on-quarter, it means your business is growing—but it also means your quarterly cash outflow will be larger. You need to provision for this in advance.
Tools for managing cash flow
For low-volume dealerships (fewer than 10 cars a month), a well-structured spreadsheet is sufficient to run a monthly forecast with weekly breakdowns.
For medium and large volumes, integrating your cash forecasting with your dealer management system (DMS) lets you see pending finance receipts, unpaid stock purchases, and active deposits in real-time. This integration cuts out the manual work of updating your forecast and reduces the danger of making decisions on outdated data.
To understand what features a DMS must have to secure this integration, you can check out our guide on what a DMS is in the automotive sector and how to choose the right one.
Over 750 dealerships already use Dealcar to manage their daily operations
Dealcar centralises sales, pending payments and stock in one platform, letting you view your cash position at a glance without having to gather data from multiple sources. With this information ready in real-time, building and updating your monthly forecast is a matter of minutes.
If you want to see how it works, you can book a free demo at dealcar.io.
Frequently asked questions
How often should I update my cash forecast?
At least monthly, with a weekly review if you handle high transaction volumes or are going through a tight liquidity patch. A forecast loses its value if it is only looked at when a crisis strikes: its key function is to anticipate, not react.
What is the minimum working capital a dealership should keep?
As a rule of thumb, between 1.5 and 2 months of fixed expenses (rent, payroll, insurance, software). This buffer allows you to absorb a poor sales month without running into difficulty. For dealerships with heavily financed stock, the required working capital is higher because the purchase-to-receipt gap is longer.
Is VAT classified as part of cash flow?
Yes. The VAT that a dealership collects from its customers is not business income: it is a liability that must be settled quarterly. If you include it in cash inflows but fail to account for it in quarterly outflows, your forecast will overestimate your available liquidity.
How does the Margin Scheme affect cash flow compared to the standard VAT scheme?
On Margin Scheme sales, you do not charge VAT explicitly to your customer, but you must pay HMRC the VAT calculated on your gross margin. This quarterly outflow is lower than under the standard VAT scheme (because the tax base is the profit margin, not the full selling price), but it still exists and must be represented in your forecast. To understand the exact calculations, consult the complete Margin Scheme guide for dealerships.
Table of Contents
Why cash flow is not the same as profit
Cash inflows in a dealership: when the money actually arrives
Cash outflows: the payments that strain liquidity the most
How to build a monthly cash forecast step-by-step
The four most common liquidity strains in dealerships
How to use forecasting to make inventory decisions
Early warning indicators
Tools for managing cash flow
Frequently asked questions
Why cash flow is not the same as profit
A dealership selling 20 cars a month can be generating accounting profit and still experience real difficulties paying the following month's payroll. This happens because accounting profit recognises income when the cars are sold, but the money only reaches the bank account when it is collected. And between selling and collecting, there can be days, weeks or even months of difference.
In a used car dealership, the most common gaps are: payments from finance companies arriving 5–10 days after the vehicle is delivered, deposits that do not cover that week's supplier payments, stock purchases from private individuals that are paid in cash but whose cars have not yet been sold, and quarterly VAT returns that fall when cash is at its tightest.
Cash flow is the map of these gaps. Without it, decisions on stock purchases, hiring or investment are made with incomplete information.
Cash inflows in a dealership: when the money actually arrives
Identifying when money actually comes in, not just when a sale is agreed, is the first step towards a useful forecast.
Cash sales. The money arrives on the same day or the immediate days following the vehicle's delivery. This is the most predictable inflow and the one that causes the least cash strain.
Finance sales. The finance company typically transfers the amount to the dealership between 3 and 10 working days after the finance agreement is signed. You must know the usual timeframe of each finance company you work with and factor it into your forecast. A sale closed on the 28th may not be settled until the following month.
Deposits and reservations. These are immediate but partial inflows. They only cover between 5% and 15% of the vehicle's price. They cannot be treated as if they were the full payment.
Finance commissions. These are settled on a variable schedule (monthly, fortnightly or per transaction). It is vital to know each provider's calendar to factor them correctly into the forecast.
Warranties and extra services. If you sell third-party warranties, the payout of the commission follows the provider's payment cycle. If you offer an in-house warranty, there is no separate cash inflow (it is included in the vehicle price).
Cash outflows: the payments that strain liquidity the most
Stock purchasing. This is the largest expenditure and the one most dependent on day-to-day decisions. Buying from a private individual means paying in cash on the spot. Buying at auction means paying in the days following the winning bid. Capital tied up in unsold cars is cash tied up.
Preparation expenses. Workshops, valeting, photographers, MOTs. These are small outlays per vehicle but they build up. For a dealership with 15–20 new arrivals of stock a month, these can add up to between £5,000 and £15,000 monthly.
Rent and utilities. Predictable, fixed monthly payments. They form the foundation of your fixed overheads budget.
Payroll and Social Security. Payroll is normally paid on the last working day of the month or the first day of the following month. Social security and pension contributions are paid early in the following month. These are non-negotiable commitments that must always be covered.
Quarterly VAT. This is the outflow that catches out dealerships that fail to plan for it. In the submission months, the net VAT payment can be significant depending on the quarter's sales volume. For a dealership with healthy sales, it can easily equal several weeks of operating expenses.
Refunding deposits. If a deal falls through, you must return the deposit. Although not a regular occurrence, it should be accounted for in the forecast.
To understand how quarterly VAT affects cash flow according to the regime applied to each transaction, you can consult our guide on when to invoice with VAT and when to apply the Second Hand Margin Scheme (REBU).
How to build a monthly cash forecast step-by-step
A cash forecast does not need to be sophisticated to be useful. The goal is to obtain a 4-to-8-week view of what is going out and coming in, with enough detail to anticipate bottlenecks.
Step 1: Estimate forecast sales for the month. Based on available stock, historical sales for the same period in previous years, and current market pace, estimate how many cars you will sell and at what average price. Do not use the list price: use the realistic selling price.
Step 2: Convert sales into receipts. For every predicted sale, estimate when the money will hit your bank account. Cash sale: same day. Finance sale: add 5–10 days. Reservation deposit: immediate, but only the deposit percentage.
Step 3: List all outflows for the month. Group them into fixed (rent, salaries, insurance, software subscriptions) and variable (planned stock purchases, vehicle preparation, marketing). Include quarterly tax payments if it is a VAT submission month.
Step 4: Calculate the net balance week by week. A monthly forecast is far more useful broken down by week. Knowing that you will finish the month in profit does not stop you from causing an overdraft in week two if your sales are concentrated at the end of the month.
Step 5: Spot periods of pressure and act early. If the forecast shows a negative balance in week 2, you have time to chase a payment, postpone a stock purchase, or draw on a business loan. If you only spot it once it has happened, your options are fewer and more expensive.
The four most common liquidity strains in dealerships
Aged stock. Every car that sits for more than 60–90 days is tied-up capital that is not generating cash. A dealership with 5 cars parked up for more than three months could have £50,000–£80,000 locked away. Stock turn is not just a sales metric: it is a liquidity metric. To measure and improve your turnover times, you can consult our article on how to reduce used stock turnaround times.
Purchasing outpaces sales. Buying more stock than you can sell in the coming month ties up cash before you have the revenue to offset it. Stock purchasing must be synchronised with your sales forecast and current cash position.
Unprovisioned quarterly VAT. If a dealership does not put aside a portion of its sales revenue monthly for the quarterly VAT return, that payment descends as a nasty surprise that drains cash at the worst possible moment. The solution is to calculate your estimated net VAT monthly and move this amount into a separate account.
Mismatches between paying for purchases and collecting sales. If you pay for stock in cash on the spot but your sales receipts are delayed (finance companies, customers paying only on collection), there is a structural gap that compounds. Knowing your average gap allows you to correctly estimate your required working capital.
How to use forecasting to make inventory decisions
Cash forecasting is not just a bookkeeping exercise: it is a decision-making tool. Here are the decisions that improve when backed by an up-to-date forecast:
When to buy and how much. If your forecast shows three consecutive weeks of tight cash, it is not the moment to buy three cars at auction that require immediate payment. If the forecast shows a month of strong inflows, you can be more aggressive with your acquisitions.
Which cars to discount. Vehicles with high days-in-stock should be evaluated not just on their margin but on their opportunity cost: every week they sit on the forecourt is money that is not circulating. A discount that speeds up a sale can do more for your cash position than waiting out for the perfect price.
Whether to accept finance providers with longer settlement times. If a new finance company offers better commission rates but pays out in 15 days instead of 5, the cash flow impact is very real and must be assessed before signing up.
To see how profitability and stock turn KPIs connect with financial management in a dealership, you can view the article on the KPIs every car dealership should measure.
Early warning indicators
These are the indicators that, upon deteriorating, warn of cash flow issues before they show up on your bank statement:
Average days in stock. If this climbs steadily above 60–70 days, your tied-up capital is growing.
Fixed cost coverage ratio. How many months of fixed overheads your available cash would cover if sales stopped completely. Below 1.5 months, your position is fragile.
Finance penetration rate. The higher the percentage of finance sales, the higher the timing gap between sale and cash. If this rises significantly, your required working capital also rises.
Quarterly VAT trend. If your liability grows quarter-on-quarter, it means your business is growing—but it also means your quarterly cash outflow will be larger. You need to provision for this in advance.
Tools for managing cash flow
For low-volume dealerships (fewer than 10 cars a month), a well-structured spreadsheet is sufficient to run a monthly forecast with weekly breakdowns.
For medium and large volumes, integrating your cash forecasting with your dealer management system (DMS) lets you see pending finance receipts, unpaid stock purchases, and active deposits in real-time. This integration cuts out the manual work of updating your forecast and reduces the danger of making decisions on outdated data.
To understand what features a DMS must have to secure this integration, you can check out our guide on what a DMS is in the automotive sector and how to choose the right one.
Over 750 dealerships already use Dealcar to manage their daily operations
Dealcar centralises sales, pending payments and stock in one platform, letting you view your cash position at a glance without having to gather data from multiple sources. With this information ready in real-time, building and updating your monthly forecast is a matter of minutes.
If you want to see how it works, you can book a free demo at dealcar.io.
Frequently asked questions
How often should I update my cash forecast?
At least monthly, with a weekly review if you handle high transaction volumes or are going through a tight liquidity patch. A forecast loses its value if it is only looked at when a crisis strikes: its key function is to anticipate, not react.
What is the minimum working capital a dealership should keep?
As a rule of thumb, between 1.5 and 2 months of fixed expenses (rent, payroll, insurance, software). This buffer allows you to absorb a poor sales month without running into difficulty. For dealerships with heavily financed stock, the required working capital is higher because the purchase-to-receipt gap is longer.
Is VAT classified as part of cash flow?
Yes. The VAT that a dealership collects from its customers is not business income: it is a liability that must be settled quarterly. If you include it in cash inflows but fail to account for it in quarterly outflows, your forecast will overestimate your available liquidity.
How does the Margin Scheme affect cash flow compared to the standard VAT scheme?
On Margin Scheme sales, you do not charge VAT explicitly to your customer, but you must pay HMRC the VAT calculated on your gross margin. This quarterly outflow is lower than under the standard VAT scheme (because the tax base is the profit margin, not the full selling price), but it still exists and must be represented in your forecast. To understand the exact calculations, consult the complete Margin Scheme guide for dealerships.
