Cash sitting in a trading account may earn interest, but the displayed balance alone rarely determines the payment. Brokers can apply eligibility thresholds, exclude certain funds, and use different rates depending on currency and account classification. The resulting credit may be smaller than an advertised annual percentage suggests.
A Forex and online CFD trading broker that offers interest on qualifying cash should explain which balances count, how daily accrual works, and when accrued amounts become available. Interest paid on cash is separate from financing charged on leveraged positions.
Eligible Cash May Be Lower Than the Account Balance
A broker might calculate interest on settled, uninvested cash rather than total account equity. Unrealized CFD profits, pending deposits, and amounts committed as margin may be excluded, depending on the product terms.
Consider an account displaying $25,000 in equity, including $4,000 in unrealized gains and $6,000 reserved against open positions. If the broker excludes both amounts, only $15,000 may qualify. Other firms might use a different definition, so the eligibility formula matters more than the headline balance.
Minimum thresholds create another distinction. A $10,000 qualifying balance could earn interest on the entire amount once the threshold is reached, or only on the portion above it. Those methods produce different results despite identical advertised rates.
Daily Accrual Can Differ From the Advertised Annual Rate
Interest is often calculated using a daily balance and an annualized rate. The day-count convention, whether 360 or 365 days, affects the calculation, as does the treatment of weekends and rate changes.
Suppose a hypothetical account qualifies for 3.6% annual simple interest on $20,000 for 30 days, using a 360-day basis. The gross accrual is $60, calculated as $20,000 multiplied by 0.036 and by 30/360.
Under a 365-day convention, the same inputs produce approximately $59.18. The difference is modest over one month but illustrates why precise terms are needed when reconciling statements.
Rates described as variable may change before a monthly payment arrives. A quoted annual rate is not a guarantee of that return for an entire year.
Opening a CFD Can Reduce Interest While Increasing Trading Costs
Imagine a hypothetical customer holding $24,000 in eligible cash at an annual interest rate of 4%, calculated on a 365-day basis. Leaving the funds untouched for 20 days would generate approximately $52.60 in gross simple interest.
Instead, the customer opens a long CFD on 300 shares of a US waste-management company at $80. The $24,000 notional position requires $4,800 in margin. Assume the broker excludes that reserved amount from interest eligibility and charges overnight financing of 8% annually on the $24,000 notional exposure.
Over 20 days, eligible cash falls to $19,200, earning approximately $42.08. Financing on the CFD reaches approximately $105.21, before other trading costs. If the share price is unchanged, the account still incurs a net financing cost, and it has forgone about $10.52 in cash interest.
Interest credited on unused funds does not neutralize financing charged on leveraged exposure. The two calculations may use different bases, rates, and payment schedules.
Payment Timing and Currency Can Alter the Usable Credit
A Forex and online CFD trading broker may accrue interest daily but distribute it monthly, quarterly, or only after a minimum payable amount accumulates. Until credited, the accrual might not count toward withdrawable cash or margin equity.
Currency matters as well. Dollar and euro balances can attract different rates, while conversion into the account’s base currency may introduce exchange costs. Tax withholding, where applicable, can further reduce the net payment.
A higher rate on a foreign-currency balance may therefore produce less usable value than expected after conversion and deductions. Customers should compare the net credit in the currency they actually spend or trade.
Interest Offers Do Not Eliminate Custody and Eligibility Questions
An attractive cash rate says little by itself about where client funds are held or the protections applicable to them. Segregation, deposit insurance, and compensation arrangements depend on the legal structure and jurisdiction, not merely the existence of interest payments.
Eligibility can also change if the customer moves jurisdiction, changes account classification, or falls below a required balance. The broker should disclose whether interest is contractual, promotional, or subject to discretionary revision.
Before opening a CFD position, obtain the current cash-interest schedule and identify the qualifying balance, exclusions for margin, day-count basis, credit date, and currency-specific rate. Calculate the expected interest lost when margin is reserved, then compare it with the position’s overnight financing charge using the intended holding period.
