Price Elasticity of Demand

Price elasticity of demand measures how strongly the quantity demanded responds to a change in price, usually as the percentage change in quantity divided by the percentage change in price. A transaction fee raises the effective price directly through a charge or indirectly through higher product prices. Pass-through is the portion of that fee ultimately reflected in the price paid by consumers.

Elasticity and the distribution of the fee burden

The party formally charged the fee need not bear its final economic burden. Economic incidence depends mainly on the relative elasticities of demand and supply.

• When demand is relatively inelastic, sellers can pass through a larger share because the resulting price increase causes a comparatively small fall in transactions.
• When demand is relatively elastic, a higher effective price causes a larger fall in transactions, giving merchants or providers a stronger incentive to absorb the fee or seek another source of revenue.
• More generally, the side of the market that is less responsive to price tends to bear the larger burden.

Why actual pass-through may differ

• Greater supply elasticity generally makes it easier to shift the burden towards consumers, while inelastic supply leaves more of it with suppliers.
• Competition and market power influence whether firms adjust consumer prices, accept lower margins or alter service quality.
• Substitutes, switching costs, consumer awareness and the time available to adjust all affect the relevant demand elasticity.
• In a two-sided payment market, providers may rebalance charges between consumers and merchants, so pass-through need not appear as a direct consumer surcharge.

Fee design and inclusive growth

The form of the charge determines how elasticity translates into behavioural and distributional effects.

• A fixed per-transaction fee forms a larger percentage of a small payment than of a large payment, whereas an ad valorem fee rises with transaction value.
• If low-value or price-sensitive users have elastic demand, a fee may reduce their transaction volumes or encourage movement towards cheaper payment methods.
• Recovery through general product prices can spread the burden across customers using different payment methods.
• Policy assessment should therefore examine segment-specific elasticity, fee structure and final incidence rather than only identifying the nominal payer.