Nominal Interest Rate

Short definition

The nominal rate is the unadjusted rate in the contract and in the payment. Loan instalments, coupons and CBRT announcements are nominal; the real burden is a separate calculation.

Detailed explanation

Effective/compound nominal exceeds the coupon once periodisation and fees are in. Inflation accounting splits the P&L; the cash coupon stays nominal.

High nominal enlarges cash service and cash-like outflows. Even if real is negative, the till pays the nominal coupon.

Why it matters for the CFO

The DSCR denominator is nominal cash. Easing the budget because real rates are low ignores the cash outflow.

How it is calculated

1 + r_nominal ≈ (1 + r_reel) × (1 + π)

Fisher’s compound link. Additive at small rates, multiplicative at large ones.

Variables in the formula

• r_nominal: the contractual stated rate
• π: inflation component

How to read it

Nominal ≈ real + inflation + a cross term. Which π you use changes the real read.

Definitions are educational. They are not investment, credit or tax advice.