Buying Heating Oil in the UK: Everything You Need to Know

Quick Answer: How to Order Heating Oil

To order heating oil, check your tank level, choose a safe order quantity, compare local quotes, confirm the delivery window, and make sure the tanker can access your tank. Most UK homes use standard kerosene, also called 28-second heating oil or burning oil.

Use this quick checklist before placing an order:

1. Check your tank gauge and tank capacity.
2. Leave enough space for the delivery. Do not order more than the tank can safely hold.
3. Compare prices for your postcode and order size.
4. Confirm access notes, hose distance, locked gates and any mini-tanker needs.
5. Keep the delivery ticket after the driver fills the tank.

If you are unsure whether to order 500 litres or more, read our 500 litre heating oil guide and use the oil usage calculator to estimate how long the delivery should last.

Quick buying decisions:

Before You Order

Before placing a heating oil order, there are a few things you need to know and check:

Check Your Tank Level

Always check your current oil level before ordering. This tells you:

• How much you need — Don't guess; know your tank's capacity and current level
• Whether it's urgent — Below 25%? Order soon. Below 10%? Order immediately

How to Check: Most tanks have a gauge (sight tube or float gauge). If yours doesn't work reliably, use a dipstick or check the sight glass. Some homeowners install smart monitors that send alerts to their phone.

Know Your Tank Size

Common domestic oil tank sizes in the UK:

• 1,000 litres — Most common, suits 2-3 bedroom homes
• 1,200 litres — Popular upgrade, provides more buffer
• 1,360 litres (300 gallon) — Often found in older properties
• 2,500 litres — Large properties or farmhouses

Knowing your tank size prevents over-ordering (spillages are costly and environmentally damaging).

Confirm Access Requirements

Delivery tankers are large vehicles. Ensure:

• Your property has clear access for a delivery lorry
• There are no overhanging branches, low walls, or narrow gates blocking access
• The driver can get the hose to your tank (maximum reach is typically 30 metres)

If access is restricted, inform the supplier when ordering. Some areas require smaller "mini-tankers" which may cost more.

How Much Should You Order?

The right order quantity balances cost savings against your storage capacity and cash flow.

Minimum Orders and 500 Litres

Many suppliers set a minimum delivery around 500 litres. Smaller deliveries may be available in some areas, but they usually cost more per litre because the supplier still has to cover the tanker, driver and routing cost.

A 500 litre order can make sense if:

• you are testing usage in a new home
• cash flow matters more than the lowest pence-per-litre price
• your tank does not have room for a larger delivery
• you need enough oil to bridge to a planned summer fill

If your tank has room and your budget allows, 1,000 litres usually gives better value per litre. For a more detailed comparison, see how much 500 litres of heating oil costs.

General Recommendations

Why Larger Orders Save Money: The per-litre price drops significantly with volume. Ordering 1,000 litres instead of 500 can save 5-8p per litre — that's £50-£80 in savings.

Factors to Consider

Available Budget: While larger orders are cheaper per litre, you need the cash upfront. If budget is tight, 500 litres is fine — you're not losing much per litre compared to 600-700L orders.

Time of Year: In summer, consider filling completely to take advantage of lower prices. In winter, order what you can afford without waiting until desperation sets in.

Storage Losses: Oil stored for very long periods can degrade slightly, though modern kerosene is stable for 18-24 months. Don't over-order if you use very little oil.

Types of Heating Oil

Not all heating oil is the same. Understanding the types ensures you order the right fuel for your system.

Which Heating Oil Do I Need?

For most domestic oil boilers, the answer is standard kerosene. Do not switch fuel type based on price alone, because the wrong fuel can damage the burner, void the warranty or cause unsafe combustion.

If you have just moved in, check the boiler manual, service sticker, previous delivery ticket or ask an OFTEC technician before ordering. If the tank contains standard kerosene already, normal kerosene from another supplier can be mixed safely.

Kerosene (28-Second Oil)

Also known as: Standard heating oil, burning oil, C2, 28-second

This is what most UK homes use. It's a light, clean-burning fuel suited to modern domestic oil boilers and range cookers (AGAs, Rayburns).

• Appearance: Clear to pale yellow
• Viscosity: Light (28 seconds in the standard test)
• VAT: 5% for domestic heating

Premium Kerosene

Standard kerosene with added benefits:

• Cleaner burning — Less soot buildup in your boiler
• Better stability — Lasts longer in storage
• Improved cold-weather performance — Additives prevent waxing in extreme cold

Costs 2-4p per litre more. Worth considering for exposed tanks or infrequent users.

Gas Oil (35-Second Oil / Red Diesel)

Not for domestic boilers!

Gas oil is thicker, dyed red, and primarily used for agricultural machinery and commercial heating. Using it in a domestic boiler will void your warranty and damage the system.

Finding the Right Supplier

Choosing a supplier isn't just about price. Consider:

Local vs National

Local Independent Suppliers:

• Often more flexible on delivery times
• May offer personal service and local knowledge
• Can sometimes beat national prices on delivery routes they already cover

National Suppliers:

• Larger operations with extensive coverage
• May have more competitive base prices
• Often offer online ordering and tracking

What to Look For

• UKIFDA membership — Shows adherence to industry standards
• Clear pricing — No hidden delivery charges
• Flexible delivery windows — Especially important if you work from home
• Positive reviews — Check Google, Trustpilot, or local Facebook groups
• Payment options — Card payments are standard; some offer finance

The Easy Way: Compare Online

Rather than phoning multiple suppliers, use our price comparison tool to get instant quotes from verified suppliers in your area. Enter your postcode and order quantity to see real-time prices, compare options, and order with confidence.

Alternatively, browse our local suppliers directory to discover heating oil suppliers in your county. You'll find contact details, coverage areas, and key information to help you choose the right supplier for your needs.

The Delivery Process

Understanding how delivery works helps you prepare:

What to Expect

1. Ordering: You place an order specifying quantity and delivery date window
2. Scheduling: The supplier adds you to their delivery route (typically 2-5 working days)
3. Delivery day: A tanker arrives and pumps oil into your tank via a hose
4. Payment: Usually taken at time of order (card) or on delivery (rare now)

Delivery Timing

• Standard delivery: 3-7 working days (cheapest)
• Priority delivery: 1-2 working days (small premium)
• Emergency delivery: Same day or next day (can cost £30-50+ extra)

Pro Tip: Order before you're desperate. Emergency deliveries are expensive and often limited in winter.

When to Buy Heating Oil

The best time to buy heating oil is before you need it urgently. Summer can be cheaper because demand is lower, but market prices do not follow the same pattern every year.

Use this rule of thumb:

• above 50% tank level: compare prices and wait for a sensible quote if the market looks unsettled
• 25-50% tank level: start comparing and order if the price is acceptable
• below 25% tank level: prioritise delivery certainty over trying to save a few pence per litre
• below 10% tank level: order urgently and avoid running the boiler down into sludge

If you are unsure how quickly the remaining oil will last, use the runout calculator before deciding whether to wait or order now.

On Delivery Day

• You don't need to be home — Most deliveries don't require you to be present
• Ensure access is clear — Move cars, open gates if needed
• The driver leaves a ticket — This shows how much was delivered

Payment Options

Card Payment (Most Common) Pay when you order. Debit cards are usually fee-free; some suppliers charge 1-2% for credit cards.

Bank Transfer Some suppliers accept BACS payment. Usually requires payment before delivery.

Budget Payment Schemes Spread the annual cost over 12 months with fixed monthly payments. Suitable if you'd struggle with lump-sum payments, though you lose flexibility on timing purchases.

Buying Group Payments If ordering through a syndicate, payment is typically coordinated by the organiser.

Heating Oil Buying Groups

Buying groups (also called syndicates or clubs) pool orders to negotiate discounts.

How They Work

1. A coordinator collects orders from members (often 10-50 households)
2. They approach suppliers with the combined volume
3. Suppliers compete for the bulk order, offering better prices
4. Everyone in the group gets the discounted rate

Typical Savings

Groups can secure prices 2-5p per litre cheaper than individual orders. For 1,000 litres, that's £20-£50 saved.

Finding a Buying Group

• Check with your parish council or community association
• Search Facebook for local groups
• Ask neighbours if they're part of one
• OFTEC maintains a list of registered groups

Downsides

• Less flexibility: You order when the group orders
• Coordination required: Someone has to organise it
• Same delivery window: The whole group gets delivered together

Advice for First-Time Buyers

New to heating oil? Here's what you need to know:

Step 1: Understand Your System

Find out:

• Your tank location and size
• What fuel your boiler uses (almost certainly kerosene)
• Who last serviced the boiler and when

Step 2: Check Your Tank

Have an OFTEC technician inspect your tank if you've just moved in. Old tanks may need replacing, and you're responsible for any environmental damage from leaks.

Step 3: Get Multiple Quotes

Don't just call the previous owner's supplier. Compare prices — you might find significant savings.

Step 4: Start with a Moderate Order

If you're unsure about consumption, start with 500-700 litres. Track usage over a few months to understand your needs before committing to larger orders.

Step 5: Plan Ahead

Don't wait until winter to figure this out. Summer is the best time to fill up and establish supplier relationships.

Frequently Asked Questions

How do I order heating oil? Check your tank level, choose a safe quantity, compare local quotes, confirm delivery access and keep the delivery ticket after your tank is filled.

What's the minimum order for heating oil? Most suppliers require a minimum of 500 litres for delivery. Some mini-tanker services accept smaller orders (300L+) but charge more per litre.

Is 500 litres enough heating oil? It can be enough for a short-term top-up or smaller household, but how long it lasts depends on your property, insulation, boiler efficiency and the time of year.

Can I order less than 500 litres of heating oil? Some suppliers offer smaller deliveries, but they are usually more expensive per litre and may not be available in every postcode.

What heating oil do I need? Most UK domestic oil boilers use standard kerosene, also called 28-second heating oil or burning oil. Check the boiler manual, service record or installer advice before ordering a different fuel.

When should I buy heating oil? Summer is often cheaper, but the safest answer is to buy before the tank is urgent. Start comparing around 25-30% tank level and avoid emergency delivery where possible.

Can I mix different brands of heating oil? Yes, all standard kerosene is compatible. You can safely use different suppliers for different orders.

How long does heating oil last in the tank? Modern kerosene is stable for 18-24 months when stored properly. Longer storage may lead to degradation and water contamination.

What if I run out of heating oil? If your tank runs empty, you'll lose heating and hot water. The boiler may need bleeding to restart. Don't run on sediment — it damages the system. Order emergency delivery immediately.

Do I need to be home for delivery? Usually not, as long as the driver can access your tank. If you have locked gates, arrange access.