Sketch A
The cash pile in easy access
Imagine a basic-rate taxpayer in Devon with 40,000 pounds in an easy-access account outside an ISA, and a smaller emergency buffer in a current account that pays nothing. When Bank Rate was near zero, the difference between "somewhere" and "a decent easy-access rate" was pennies. After the hiking cycle, that difference became a grocery bill, and then a tax question.
The personal savings allowance is commonly 1,000 pounds of interest for a basic-rate taxpayer and 500 pounds for a higher-rate taxpayer, with no allowance for an additional-rate taxpayer. Interest above the allowance is taxed. A cash ISA shelters interest, within the annual ISA allowance, which has for years been 20,000 pounds across ISA types. Confirm both figures for the tax year you are in. They are set by Parliament, not by the MPC.
The sketch is not "move the 40,000". It is: write down the rate, the tax wrapper, and whether the balance is an emergency fund that must stay liquid or a sum that could lock for a year. A fixed-term deposit gives up access. That is a feature of the contract, not a footnote.
Sketch B
The fix that ends in the spring
A household has 240,000 pounds remaining on a repayment mortgage, fixed for five years at a rate agreed when swaps were lower. The fix ends in six months. The lender's follow-on rate is an SVR well above the new two-year and five-year fixes being offered in the market. The relevant price is not today's Bank Rate. It is the swap-implied fix they can reserve, the fee, the early repayment terms if they switch lender, and whether the loan still fits affordability tests.
A quarter-point cut announced before completion may or may not be inside the product they reserved. Some offers track a rate that can change before completion. Some are a locked price. The illustration only works if someone reads the offer, which is an unglamorous sentence and the one that saves money.
Overpaying while the old cheap fix still runs can reduce the balance that will be refinanced. It can also be the wrong use of cash if the easy-access rate, after tax, exceeds the mortgage rate they are currently paying. Compare the two rates they actually have, not the rates in a headline.
Sketch C
A SIPP with a gilt ladder and shares
Someone ten years from drawing a pension holds a self-invested personal pension split between a short gilt ladder, a global equity fund, and a cash park inside the wrapper. The gilt ladder is a plan to have known sterling amounts mature in particular years. The equity fund is a claim on businesses, mostly outside the UK, unhedged, so the statement moves with overseas markets and with sterling.
A rise in gilt yields hurts the mark-to-market of the longer rungs and, if the person does not sell those rungs, still delivers the contracted cash at maturity, subject to the government paying. The equity line can fall in the same month for discount-rate reasons or for an earnings shock that has nothing to do with Threadneedle Street. Adding the two red numbers and calling the sum "the interest-rate loss" mixes a duration effect with a business effect.
Inside a pension, the savings-allowance arithmetic of Sketch A does not apply in the same way. Wrappers change the tax story. They do not repeal duration or equity risk.
