Touring by vehicle is one of the cheapest ways to holiday in Australia — but "cheap" is relative, and a 6-week big lap will hit your wallet harder than you expect if you don't plan. Fuel + camping fees + groceries + miscellaneous expenses add up fast.

Here's the practical guide to budgeting for road trips — what the actual costs are, how to estimate before you go, and the small habits that keep the budget on track.

Photo by Trevor McKinnon on Unsplash

• Fuel + vehicle running costs — typically the biggest single line item
• Gas, generator fuel, boat fuel — for cooking, power, recreation
• Food + drink — typically similar to home costs, slightly higher in remote areas
• Caravan park / National Park fees — $0 for free camps, $10-15 NP, $35-60+ caravan park
• Entertainment, sightseeing, gifts, souvenirs — varies enormously
• Miscellaneous — laundry, parking, internet, repairs, the unexpected

• Top-down: "I have $5,000 and 6 weeks. How far can I go + how do I make it last?" — useful when budget is the constraint
• Bottom-up: "I want to drive the Big Lap (15,000km, 12 weeks). What will it cost?" — useful when destination is the constraint

Most people end up with a hybrid: a destination idea + a rough budget cap, then refine.

Most people overestimate how much they'll drive. Realistic figures:

• 300-400km/day with one driver, comfortable pace, plenty of stops
• 500-600km/day with two drivers + good roads + minimal stops
• 700-800km/day with two drivers + interstate highways + commitment to the drive
• Towing reduces these by ~20%
• Outback gravel reduces by 50%

Build in rest days — every 3-4 driving days = 1 rest day for laundry, vehicle service, just exploring.

Photo: Trevor McKinnon / Unsplash

Total kilometres ÷ litres per 100km × dollars per litre = approximate fuel cost.

Real-world fuel use estimates:

• Small car (Hyundai i30, Toyota Corolla): 7-9L/100km
• Mid-sized SUV (CX-5, RAV4): 9-11L/100km
• Large SUV / 4WD (Prado, Pajero): 11-14L/100km solo, 15-18 towing
• Big 4WD (LandCruiser, Patrol): 13-16L/100km solo, 18-22 towing
• Caravan towing adds 30-50% to base fuel use
• Hilly + offroad adds 20-40%

Remote-area fuel premiums — fuel can be 50-100% more expensive in remote stations (Northern Territory + far western SA + WA outback). Budget $2.50-$3+/L for outback fuel.

• Free bush camps (state forests, road rest stops, river reserves) — $0
• Free truck stops + showgrounds — $0-10 (small donation)
• National Parks campgrounds — $10-25 per site per night
• Standard caravan parks — $35-50 unpowered, $45-70 powered
• BIG4 + Discovery Parks (premium) — $50-90 powered + cabins $120-300
• Hipcamp (private landowners) — $20-40, often beautiful + uncrowded

Mix wisely: 60% bush camp + 30% NP + 10% caravan park is a good balance of cost vs comfort. Pure caravan park = expensive; pure bush camp = no laundry / no charge / no shower.

• Cooking from camp: roughly equal to home costs ($25-50/person/day depending on quality of food)
• Small-town IGA prices are typically 30% higher than supermarket. Bulk-buy in regional centres
• Eating out at pubs adds significantly — $25-40/main course in country pubs
• Coffee from servos / cafés — $5-7. Adds up at 2 per day
• Fishing for dinner — saves a lot if you're successful
• Fresh produce at roadside stalls + farmers markets often cheaper + much better than supermarket

Photo: Sammy Wong / Unsplash

• Seniors Card (if eligible) — discounts at heaps of attractions, cafés, fuel stops
• RACV/RACQ/RAA membership — roadside assistance + accommodation discounts. Pays back on the first breakdown
• BIG4 Holiday Parks membership — 10% off, sometimes more in low season
• Discovery Parks membership — similar discount structure
• National Park annual passes — most states. Pays back after 3-5 visits
• Wikicamps Pro ($8 lifetime) — best Australian camping app, no ads, more features

Always add 15-25% to your calculated budget for the unexpected:

• Tyre blowout ($300-600 per replacement in remote areas)
• Windscreen chip + replacement ($300-1500)
• Vehicle service if needed mid-trip ($200-800)
• Tow if you break down ($200-2000)
• Medical emergency or unexpected accommodation
• The bargain souvenir/local product/seasonal special you can't resist

Carry two credit cards in different locations (one in vehicle, one on person) in case one is lost or stolen. Also carry enough cash for day-to-day in remote areas where credit may not be accepted.

A simple travel journal helps massively:

• Log fuel costs (litres + price + km) — calculates your real-world consumption
• Log accommodation per night
• Note unexpected expenses
• Compare against estimated budget weekly
• Adjust pace + spending if running over

Bonus: the journal is invaluable for planning the NEXT trip — actual real costs, not optimistic estimates.

Road tripping is cheap relative to almost any other holiday — but the costs are real and add up fast if you don't plan. Estimate fuel + accommodation + food carefully, build in 20% emergency margin, mix camp types to balance cost vs comfort, and track as you go.

Most overspend on a Big Lap comes from underestimating fuel + eating out too often + impulse caravan park stays. Discipline on those three keeps the budget honest and the trip going longer.