Detective Allowance Calculator

What "fully pensionable" means for long-term value

Because detective allowance is added directly to pensionable pay, every pound of it contributes to your CARE pension accrual at the standard 1/55.3 rate, just as your base salary does. An officer receiving £2,000 a year in detective allowance accrues an additional 2,000 ÷ 55.3 = approximately £36 of annual pension for that year, on top of whatever their base salary accrues. That £36 slice is then revalued each subsequent year by CPI+1.25%, exactly like the rest of their CARE pension, so its real value is protected against inflation for the remainder of their working life and into retirement.

This is a materially different outcome from receiving the same £2,000 as overtime pay, which would boost that year's take-home income but leave the officer's pension accrual completely unchanged. Over a full detective career — commonly a decade or more in an investigative role — the cumulative effect of a pensionable allowance, compounded by CPI+1.25% revaluation each year, adds a genuinely worthwhile amount to an officer's eventual retirement income, in addition to the immediate cash benefit every payday.

The tier-boundary effect: a worked example

Because PPS 2015 contribution rates are tiered — 12.88% on pensionable pay up to £37,035, 13.88% between £37,035 and £79,587, and 14.22% above £79,587 — adding a pensionable allowance can do more than simply attract contributions on the allowance itself. If it pushes an officer's total pensionable pay across a tier boundary, the higher contribution rate typically applies to the whole of pensionable pay for the year, not just the portion above the threshold, so the effect on take-home pay can be larger than a first glance at the allowance figure suggests.

Consider a detective sergeant whose base salary sits just below the £37,035 threshold for the 12.88% tier. Depending on exactly how their scheme administrator applies the tiering (some apply the higher rate to the whole of pensionable pay once the threshold is crossed, which is the more common approach for PPS 2015), adding a detective allowance that tips them into the 13.88% tier increases their annual pension contribution by considerably more than the allowance alone would suggest, as the table below shows.

This does not mean the allowance is not worth having — the pension accrual on the full, higher pensionable pay also increases correspondingly, and the extra contribution is itself a form of forced pension saving with employer top-up, not simply a cost — but it is an important detail to understand so that the net cash impact of taking on detective duties is not a surprise. This calculator applies the tiering to your own salary and allowance figures so you can see the precise effect rather than a generic estimate.

What you actually keep after tax, NI and pension deduction

Because detective allowance is added to gross pay and is fully subject to income tax, National Insurance, and pension contributions, the amount that actually reaches your take-home pay each month is meaningfully less than the headline annual figure. This calculator expresses that difference as a "keep percentage" — the proportion of the gross allowance that survives all three deductions and shows up as extra net pay.

For an officer already paying basic-rate tax and the standard employee NI rate, and contributing at the 12.88% pension tier, the combined marginal deduction on an extra pound of pensionable pay breaks down as shown below — though this is a simplification, since the pension contribution itself is deducted before tax is calculated, which means the tax relief on the pension portion effectively softens the overall reduction in take-home pay slightly compared to a naive sum of the three rates. For a higher-rate taxpayer, or an officer in the 13.88% or 14.22% pension tier, the keep percentage is correspondingly lower, because 40% tax and a higher pension contribution rate both take a larger slice.

It is worth stressing that the pension contribution, while it reduces take-home pay immediately, is not simply lost — it is building future guaranteed retirement income, at a rate heavily subsidised by the employer's 35.3% contribution on top. So while the "keep percentage" figure is useful for understanding your immediate monthly cash position, the true total value of the allowance (cash plus pension) is higher than the keep percentage alone implies.

How eligibility and amounts vary by force

Detective allowance is not a single, nationally standardised payment in the way that base pay scales are. Each force sets its own eligibility criteria — typically requiring an officer to hold an accredited investigator qualification (such as PIP2 or above) and to be substantively posted into a role that requires it — and its own rate within the broad £1,200 to £2,400 range referenced above. Some forces also operate additional or differently named allowances for specialist investigative roles, financial investigation, or major crime work, which may carry different rates and different pensionable status.

Because of this variation, the figure you enter into this calculator should be your own force's actual, current detective allowance rate, which you can typically confirm from your force's pay policy documentation or by asking your local HR or pay department.

Detective allowance compared with other pensionable additions

Detective allowance sits alongside a small number of other payments that are also fully pensionable under PPS 2015, most notably the pensionable portion of the Metropolitan Police location allowance (the £3,150 London Weighting element, as opposed to the £6,588 non-pensionable London Allowance) and the South East allowance paid by forces around London, which is typically fully pensionable in its entirety. All of these share the same basic characteristic: they add to pensionable pay, they contribute to CARE accrual, and they can push pensionable pay across a contribution tier boundary in exactly the way illustrated above.

This is worth bearing in mind for officers who might receive more than one pensionable allowance at once — for example, a detective sergeant working in the Met would receive both the pensionable London Weighting and their detective allowance, both adding to pensionable pay and both capable of contributing to a tier-boundary shift, on top of their base salary. Running combined scenarios through this calculator, entering your base salary alongside every pensionable allowance you receive, gives the most accurate possible picture of your total pension contribution and accrual for the year, rather than assessing each allowance individually and adding the effects together, which can understate the tier-boundary impact when allowances are combined near a threshold.

By contrast, overtime, and certain other one-off or irregular payments, remain outside pensionable pay altogether under PPS 2015, regardless of how much of it an officer works in a given year. This is a deliberate feature of the scheme design rather than an oversight — pensionable pay is generally intended to reflect an officer's regular, ongoing salary package rather than variable, hours-driven earnings that might differ sharply from one year to the next. Detective allowance sits on the pensionable side of that line precisely because it is treated as a standing part of a detective's regular remuneration for holding the role and qualification, rather than a payment for additional hours worked, which is why it behaves like salary for pension purposes rather than like overtime.

Putting the numbers together over a detective career

It is worth stepping back from the single-year figures to see the cumulative picture, since detective postings frequently last many years and sometimes an entire second half of a career. An officer who spends fifteen years in a detective role receiving a steady £2,000 annual allowance accrues roughly 15 × (2,000 ÷ 55.3) = approximately £543 of additional annual pension from the allowance alone, before accounting for the CPI+1.25% revaluation that applies to each year's slice from the year it is earned onwards. Because earlier years' slices are revalued for longer before retirement, the real cumulative effect is somewhat higher than this simple sum suggests, particularly for officers who move into detective work relatively early in their service.

This is also a useful figure to hold in mind when comparing a detective career path against a uniformed path that might offer more overtime opportunities but no equivalent pensionable allowance. An officer earning substantial but irregular overtime may take home more in cash in any given year than a detective colleague on a modest allowance, but none of that overtime builds pension, whereas every pound of a fully pensionable detective allowance quietly compounds into guaranteed retirement income for the rest of the officer's life. Neither path is objectively better — it depends on an individual's priorities around immediate income versus long-term guaranteed pension — but it is a genuine, quantifiable trade-off, and this calculator is designed to make that trade-off visible rather than leaving it as a vague sense that "pensionable is better."

Moving in and out of detective allowance eligibility

Because detective allowance is tied to a specific role and qualification rather than to rank, officers moving in and out of investigative postings during their career will see the allowance, and its pensionable effect, start and stop at different points. This is different from a promotion, which permanently raises base salary; detective allowance only counts towards pensionable pay for the years an officer actually holds an eligible role. An officer who spends five years in a CID posting receiving the allowance, then moves back to a uniformed role without it, banks the pension accrual and CPI+1.25% revaluation earned during those five years, but their pensionable pay reverts to base salary alone from the point they leave the role, with no further accrual benefit from the allowance until, if ever, they return to an eligible posting.

This makes it worth using this calculator at the point of any posting change, not just when first taking up a detective role, so you have an accurate, up-to-date picture of your pensionable pay and contribution tier at each stage of a career that moves between investigative and non-investigative postings. It is also worth checking with your force's pay department exactly when an allowance starts and stops being paid relative to the posting change itself, since administrative timing can occasionally lag the actual role change by a pay period or two.

Why this calculator focuses on the whole picture, not just the allowance

A simple online search for "how much is detective allowance worth" tends to return only the gross annual figure, which on its own tells you very little about the real financial effect on your household budget or your retirement income. This calculator is built to answer the more useful, and more complicated, question: given your actual base salary, your force's detective allowance rate, and the current PPS 2015 tiering and national tax and National Insurance rules, what does this allowance genuinely add to your take-home pay each month, and what does it add to your guaranteed pension each year? Those two figures, taken together, give a far more honest picture of the allowance's real value than the headline annual amount alone, and they are the figures worth having in mind both when deciding whether to pursue accredited investigator status and when discussing your total remuneration package with your force.