A switching bonus pays once and the rate pays every month

There is a settled way of talking about switching incentives. It is worth asking how much of it survives contact with the detail.

Two different kinds of money

An incentive to switch is a single payment, so its value is the same whether you move a small balance or a large one. A rate difference is proportional, so its value grows with the balance and repeats for as long as the money stays there. That means the same offer can be overwhelmingly attractive to one household and almost irrelevant to another with more on deposit.

The comparison is straightforward: work out what the rate difference is worth across a year and set it against the one-off payment. Where the bonus is larger, the offer is genuinely worth taking; where the rate difference is larger, the offer is a distraction.

The conditions attached

Incentives are almost always conditional on behaviour, such as moving regular payments across, paying in a minimum amount or keeping the account open. The conditions exist because the provider is buying a customer relationship rather than a balance, and they want the relationship to persist. Failing a condition after the payment has been made can mean the incentive is reclaimed, which is set out in the terms rather than advertised.

Where the conditions require moving your main banking, the true cost includes the administrative work of relocating every collection. That work is the reason many people accept a poor rate for years, and it is why the incentive has to be offered at all.

What you are actually acquiring

The offer buys your attention; the account is what you will live with afterwards, potentially for a long time. An attractive incentive attached to an account with a poor ongoing rate is a short-term gain and a long-term cost. It is worth reading what happens after any introductory period ends, because that is the account you will actually hold.

Over a full year, service quality, app reliability and how easily you can reach a person all matter more over years than the payment did once. Judging the account as if the incentive did not exist, and then adding the incentive back, produces a cleaner decision.

Tax and reporting

In some jurisdictions a switching payment is treated as taxable income, and in others it is treated differently or not at all. Interest earned may also be taxable depending on where you live, your total income and any allowance that applies. Neither of these is universal and both change over time, so the treatment where you live is the only one that matters.

For most households, where the sums are meaningful, checking with the tax authority or a qualified professional in your own country avoids an unwelcome surprise.

The general principle is that a headline figure quoted by a provider is a gross figure until you have established otherwise.

Serial switching and its limits

Moving repeatedly to collect incentives is a recognised practice and providers respond by restricting eligibility to new customers. Frequent applications can leave a trail on a credit file in some countries, which is worth understanding if borrowing is planned. There is also a practical ceiling, since each move consumes time and the supply of offers you are eligible for is finite.

For most households, the strategy works best for households whose balances are small enough that the rate difference is genuinely trivial. For everyone else, the durable gain comes from holding a competitive account rather than from collecting entry payments.

This is general information, not advice about your particular position.

Making the comparison once a year

A short annual check of the rate on your largest balance catches the most common failure, which is an introductory rate that has expired. Comparing against current offers takes minutes and requires no action unless the gap is large enough to matter. Where a switch is worth making, doing it in a quiet month reduces the risk of a payment failing during the transition.

For most households, keeping a note of when any promotional period ends turns the whole thing into a diary entry rather than a decision. This describes how such offers are structured and is not a recommendation of any particular account or provider.

The takeaway

Work out the annual value of the rate difference first. Only then decide whether a one-off payment changes the answer.

Costs compound as reliably as returns do, and in the same direction.