Hillingdon Council Tax Calculator, Bands and Rates: 2026/27

Hillingdon Council Tax 2026/27: £150 Million in EFS, the Heathrow Asylum Cost That No Other Borough Carries, and a Business Rates Windfall Coming in 2028

Hillingdon Council approved its 2026/27 budget at Full Council on 26 February 2026, at the meeting visible above. The Hillingdon element of the council tax for 2026/27 is £1,534.95 at Band D — up from £1,462.00 in 2025/26, a rise of £1.40 a week. Adding the Greater London Authority precept of £510.51, the total Band D bill is £2,045.46. Despite this, Hillingdon's total remains around £300 below the England average of £2,392 and approximately 14% below the average for outer London boroughs.

The budget was balanced only on the assumption of £150 million in Exceptional Financial Support across 2025/26 and 2026/27 combined — the fourth largest EFS allocation in England. Hillingdon's own budget report identifies a cost driver that is entirely specific to this borough and is found nowhere else in this entire London comparison series: as a port authority adjacent to Heathrow Airport, Hillingdon houses more asylum seekers than any other London local authority — more than four and a half times the London average — and has accumulated over £16 million in unreimbursed costs since 2020, paying approximately £5 million a year to support individuals evicted from government-commissioned hotel accommodation.

Hillingdon Council Tax Bands A-H: 2026/27 Rate Table

All eight bands are fixed fractions of the Band D rate, set nationally in ninths, based on your property's estimated market value on 1 April 1991. Hillingdon's gross council tax base stands at 116,122 Band D equivalents for 2026/27, with a 99% collection rate — one of the highest in London.

The Heathrow asylum cost: the financial burden unique to Hillingdon in this entire series

No other borough covered in this London comparison series carries anything equivalent to Hillingdon's Heathrow-specific financial burden. As a port authority — a local authority containing a major international point of entry — Hillingdon is legally required to accommodate and support individuals seeking asylum who present at Heathrow without prior arrangement. During the pandemic, the Home Office commissioned hotels throughout Hillingdon to house asylum seekers; when those individuals were subsequently evicted from that hotel accommodation after their right to remain was confirmed, Hillingdon became responsible for their housing support costs.

The council's own figures, confirmed in its 2026/27 budget materials, are stark: Hillingdon houses more asylum seekers than any other London local authority, at more than four and a half times the London average. The accumulated unreimbursed cost since 2020 exceeds £16 million, with the council paying approximately £5 million a year in ongoing support costs that central government has declined to refund. A further £1.2 million per year relates to Chagossian families arriving via Heathrow without onward travel plans, against government advice. Council Leader Cllr Ian Edwards has publicly stated: "The government's failure to understand the impact of national policy on the borough cannot continue. It is unacceptable, unfair and unreasonable to continue to expect that the cost for this national responsibility should be met by our taxpayers alone."

Even at £16 million over five years, this asylum cost is not, on its own, sufficient to explain a £150 million EFS requirement. Hillingdon's budget documents acknowledge this explicitly, noting that the asylum cost combined with historic underfunding, under-delivery against savings plans, and accounting issues identified by external auditors EY collectively produced the overall shortfall. The asylum figure is a genuinely distinct and policy-driven cost component — not a budget management failure — but it is one element among several contributing causes.

The Heathrow business rates windfall: a structural improvement incoming from 2028

Buried within Hillingdon's own budget papers is a figure that points in a very different direction from the current EFS dependency: Heathrow Airport's rateable value is rising from £210 million to £951 million as part of the 2026 Business Rates Revaluation — an increase of 353%. Heathrow's revaluation alone is driving the majority of Hillingdon's exceptional average rateable value increase across the borough (102% average, against a 22% median, illustrating how dramatically Heathrow distorts the borough's business rate base).

Government has provided a 100% Safety Net protection scheme in 2026/27, which prevents other authorities from losing heavily from this redistribution. By 2028/29, the Safety Net reduces to 92.5%, and the borough's medium-term position on business rates becomes materially more favourable as the Heathrow revaluation phases through. This is a structural future revenue improvement Hillingdon can project with some confidence — unlike savings targets, which carry delivery risk. The timing mismatch between the current EFS requirement (2025/26 and 2026/27) and the business rates improvement (phasing through from 2026/27 onwards under Safety Net rules, becoming more significant from 2028/29) is a key feature of Hillingdon's medium-term financial picture.

What Grant Thornton's benchmarking actually says about Hillingdon's efficiency

Hillingdon's own budget report includes an unusually explicit piece of external validation: Grant Thornton's benchmarking of Hillingdon services found unit costs across the General Fund to be "very low" or "low" across all service categories, with the single exception of culture and related services, which was rated "average." The council's own framing is confirmed by its own analysis of published MHCLG budget and outturn data. This is a meaningful finding in the context of a borough seeking £150 million in EFS: it suggests the financial pressure is primarily driven by inadequate funding relative to demand rather than inefficient service delivery, which is a materially different diagnosis from the picture in boroughs where operational under-performance contributes more substantially to the gap.

What the EY auditors actually said

Hillingdon's external auditors, EY, made a formal recommendation at the council's Audit Committee meeting — shortly before the budget was agreed — that the council revisit its budget to confirm it was legally balanced. This followed EY's concerns about accounting and governance procedures, including a critical report that had reportedly been delayed by three months before publication. The opposition Ruislip Residents' Association noted this publicly, raising concerns about transparency. The council's own position was that the budget was legally balanced and that the EFS confirmation from government was expected within a week of the Cabinet meeting — as subsequently occurred.

For residents, the EY recommendation is worth understanding as a professional auditing concern about the robustness of the accounting underpinning the budget, not a statement that the council was operating illegally. The distinction matters: auditor recommendations are part of the normal governance process, and councils routinely address them satisfactorily. However, an auditor recommendation of this type in the budget cycle — as opposed to the routine annual audit — is unusual enough to be worth noting.

Three real-world Hillingdon scenarios

Typical mistakes Hillingdon residents make

• Assuming Hillingdon's low headline rate means the council is financially secure. A below-average bill and a £150 million EFS requirement can coexist — and do, in Hillingdon's case.
• Attributing the entire financial gap to asylum seeker costs. The £16 million accumulated since 2020 is a real, policy-driven burden, but it is one element within a larger picture that includes historic underfunding, savings under-delivery, and accounting issues identified by EY.
• Not factoring in the Heathrow business rates windfall when making long-term financial assessments of the borough. The 353% Heathrow revaluation is a structural improvement phasing through from 2026/27, becoming more significant from 2028/29 as Safety Net protection reduces.
• Not applying for Council Tax Support separately from Universal Credit. Given the changes to the CTR scheme (non-dependant deductions increased from £10 to £12 per week from 2026/27), confirming your current award is worth doing even if you already receive it.

2025/26 versus 2026/27: what actually changed

Hillingdon's own element rose from £1,462.00 to £1,534.95 — an increase of £72.95 or 4.99%. What is materially new for 2026/27 is the confirmed EFS of £150 million across both years (the in-principle government decision was expected within a week of the budget being set), the start of the phased Heathrow business rates revaluation benefit, and two specific changes to the Council Tax Reduction Scheme: the non-dependant deduction increased from £10.00 to £12.00 per week, and changes to how the scheme treats Second Home Premiums. Both CTRS changes were consulted upon; 73% of the 26 responses received disagreed or strongly disagreed with the non-dependant deduction increase.

Decision guide: who should act on this information

Discounts and reductions available in Hillingdon 2026

Universal Credit and council tax in Hillingdon

If you receive Universal Credit, it does not automatically reduce your council tax. Use our Universal Credit Calculator to estimate your UC entitlement, then apply for Council Tax Support separately at hillingdon.gov.uk. Note that the non-dependant deduction in Hillingdon's CTR scheme increased from £10 to £12 per week for 2026/27 — if you already receive CTR with a non-dependant in your household, your award may be slightly lower than in 2025/26.

How to challenge your council tax band

Hillingdon does not decide your band — challenges go to the Valuation Office Agency. Start at gov.uk/challenge-council-tax-band. You must continue paying at your current band throughout the process; a successful challenge is refunded and can be backdated up to six years.

What happens if you miss a council tax payment

Frequently asked questions