Sweep Account Interest Calculator

Work out sweep account interest instantly with clear inputs, formula shown and shareable results.

About Sweep Account Interest Calculator

A sweep facility keeps a working balance in savings and automatically shifts the surplus into a term deposit at a higher rate, reversing it when you need the money. The blended rate shows what the whole balance effectively earns.

Formula

Sweep interest

Interest = threshold × savings rate + (balance - threshold) × deposit rate

Worked example

With the default values below, Sweep Account Interest Calculator returns Annual Interest Earned of $52,500.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Average Account Balanceminimum 0: 800,000
Balance Kept In Savingsminimum 0: 100,000
Savings Account Rateaccepts 0–100 %: 3.5 %
Sweep Deposit Rateaccepts 0–100 %: 7 %

Results

Annual Interest Earned: $52,500.00
Extra Versus Leaving It In Savings: $24,500.00
Amount Swept To Deposit: $700,000.00
Blended Rate On The Whole Balance: 6.563%

Step by step

1Values used
2Sweep interest
3Annual Interest Earned= 52,500.00
4Extra Versus Leaving It In Savings= 24,500.00
5Amount Swept To Deposit= 700,000.00
6Blended Rate On The Whole Balance= 6.563

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
Figures are estimates for planning only. Market returns are not guaranteed, and rates, limits and tax rules change. This is not financial or tax advice — speak to a qualified adviser before acting.
This is an estimate for general information and not professional financial, tax or legal advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Figures are estimates for planning only. Market returns are not guaranteed, and rates, limits and tax rules change. This is not financial or tax advice — speak to a qualified adviser before acting.

Frequently Asked Questions

Is money still accessible?

Yes. Withdrawals break the swept deposit in units, usually on a last-in-first-out basis, so liquidity is preserved.

What is the catch?

Broken deposits may earn a lower rate for the period held, so keep the working threshold realistic.