Business savings: where surplus cash should sit

Business savings should begin with liquidity, not interest rate. The question is how much cash can leave the operating account, for how long, and what would happen if the company needed that money earlier than expected.

Split cash into operating, reserve and genuine surplus layers

Do not move every pound above today's bills into savings. Start by identifying the operating buffer needed for payroll, tax, rent and suppliers. Then identify short-term reserves for known events such as VAT, Corporation Tax, annual insurance or a planned equipment purchase. Only the remaining cash is genuine surplus that can tolerate more restricted access.

For example, a company with £300,000 in the bank may need £90,000 for the next month's payroll and suppliers, £55,000 for tax over the next quarter and £25,000 as a contingency buffer. That leaves £130,000 available for a more active savings decision. The headline bank balance is not the same as investable or lockable cash.

Match easy access, notice and fixed terms to when the money may be needed

Easy-access savings are useful for reserves that may be required without warning. Notice accounts can pay more but require advance notice before withdrawal. Fixed-term deposits can offer certainty but normally restrict access for the agreed period. The best rate is poor value if the business must borrow expensively because cash is locked when a supplier or tax payment arrives.

Build a simple maturity ladder rather than placing all surplus cash in one term. A company with £120,000 of genuine surplus might keep £40,000 easy access, place £40,000 into a notice account and fix £40,000 for a defined period. The exact mix depends on the forecast. The principle is to avoid one withdrawal date controlling the whole reserve.

Compare the return after access restrictions and administration

Interest rate matters, but compare the actual annual pounds earned at the balance you expect to hold. A 0.25 percentage-point advantage on £100,000 equals £250 a year before tax. If obtaining that extra return requires multiple accounts, manual monthly transfers and extra reconciliation, the finance team's time may erase much of the benefit.

Check whether the advertised rate is variable, fixed, tiered by balance or available only to new money. Confirm minimum and maximum balances and how interest is paid. A rate that looks attractive for £10,000 may not apply to £500,000. Use the business's actual expected balance rather than comparing one headline number.

Check FSCS protection using the legal entity and banking licence

FSCS states that eligible deposits at UK-authorised banks, building societies and credit unions are protected up to £120,000 per eligible person or entity, per authorised firm from 1 December 2025. It also says that most company deposits are protected, subject to the Depositor Protection Rules. A limited company or LLP that is a separate legal entity can have its own protection separately from an individual's personal deposits.

For sole traders, FSCS does not treat the business as a separate legal person in the same way. Personal and sole-trader deposits with the same authorised firm can therefore share one £120,000 limit. Also remember that two bank brands can share one banking licence. Before spreading cash across brands, check whether the underlying authorised firm is actually different.

Manage concentration as well as interest rate

A business may choose to hold more than the FSCS limit with one bank for operational reasons, but it should know that it is doing so. Concentration can arise quietly when the operating account, tax reserve and savings account all sit with brands using the same banking licence. Produce a simple schedule showing cash by authorised institution rather than only by account name.

Concentration is not only about bank failure. It is also an access issue. If every current and savings account is with one provider and online access is disrupted, the company may temporarily lose visibility or payment capability across all cash. Some businesses therefore value a secondary banking relationship even when the interest rate is slightly lower.

Review savings whenever the cash-flow forecast or business model changes

Recheck the savings structure when hiring, borrowing, expanding abroad, buying property or entering a seasonal build-up. Cash that was genuinely surplus six months ago may become working capital. Conversely, a business that has accumulated a stable excess balance over several years may be leaving substantial interest on the table by keeping everything in a non-interest-bearing operating account.

Run the review quarterly or whenever the forecast changes materially. Record the minimum operating buffer, tax reserve, expected capital spending and amount available by time horizon. Then compare products only for the cash that fits each horizon. This keeps the savings decision connected to the business rather than turning it into a rate-chasing exercise.