Reform aviation taxes

Policy baseline

Party costings claim GBP 3.62bn from aviation-tax reform plus GBP 0.38bn from private-jet taxes.

• Targets frequent flyers and private jets.
• Households flying rarely are intended to be protected.
• Airlines may pass costs into fares.

Core trade-offs

The direct beneficiaries are the exchequer and lower-carbon incentives. The costs fall mainly on frequent flyers, airlines and tourism-linked firms. The main economic question is higher fares reduce demand and emissions.

• The exchequer and lower-carbon incentives gain most directly.
• Costs fall mainly on frequent flyers, airlines and tourism-linked firms.
• Key risk: higher fares reduce demand and emissions.

Fiscal impact by 2028-29

-GBP 5.0bn to -GBP 0.7bn. Central estimate: -GBP 2.8bn.

• Positive numbers mean net fiscal cost; negative numbers mean Exchequer savings.
• Main channel is the scored tax, spending or delivery change.
• Offsets depend on tax receipts, behaviour and pass-through.
• Range reflects uncertain implementation and economic response.
• This is not an official costing.

Economic impact by 2028-29

• Jobs: Little direct job effect; sector-specific taxes can reduce hiring in affected industries.
• Wages: Legal taxpayers may shift costs to workers, owners or consumers over time.
• Prices: Some pass-through likely where market power or fixed demand exists.
• GDP / productivity: Usually mildly negative before spending use; stronger if investment or mobility responses rise.

Assessment

This is a real trade-off, not a free gain. The exchequer and lower-carbon incentives benefit, while frequent flyers, airlines and tourism-linked firms bear most costs. Overall output depends on behaviour, capacity and pass-through.

Confidence: Medium-low. Higher on the policy target and fiscal channel; lower on behaviour, pass-through and economy-wide effects.

Main risks

• Behavioural response: Avoidance, timing and relocation can reduce receipts.
• Incidence uncertainty: Legal taxpayers may shift costs to workers, consumers or investors.
• Investment risk: Higher taxes can reduce investment where returns are mobile.

Safeguards

• Use HMRC microsimulation before legislating.
• Close avoidance routes before rate rises.
• Review receipts and investment annually.

Academic evidence

UK government evidence

Sources

• PolicyLens illustrative scenario methodology for reform aviation taxes Internal - PolicyLens, 2026
• Estimating the Effect of a Gasoline Tax on Carbon Emissions Academic article - Davis and Kilian, American Economic Journal: Economic Policy, 2011
• Funding a Fair Deal: Liberal Democrat Manifesto Costings Party costing - Liberal Democrats, 2024
• Does Britain or the United States Have the Right Gasoline Tax? Academic article - Parry and Small, Journal of Urban Economics, 2005
• For a Fair Deal: Liberal Democrat Manifesto 2024 Party policy source - Liberal Democrats, 2024

Other Liberal Democrats policies

• Introduce free personal care
• Raise Carer’s Allowance by GBP 20
• Create a Carer’s Minimum Wage
• Scrap two-child and benefit caps
• Recruit 8,000 more GPs
• Guarantee urgent NHS dentist access
• Put counsellors in schools
• Extend free school meals