July marks the midpoint of the financial year and a natural moment to step back from the day-to-day management of a rental portfolio and assess what the numbers are showing. In 2026, that assessment is more important than in most recent years. The Renters' Rights Act, Making Tax Digital, rising buy-to-let mortgage costs, and the approaching EPC compliance deadline are not future concerns. Their impact on net yield, void periods, and operating costs is already visible in the first six months of data.
The yield picture
Gross yield, the annual rental income divided by current property value, is the number landlords tend to track most closely. It is also the least informative in isolation. The figure that determines portfolio performance is net yield after costs, and 2026 has introduced several cost categories that were either absent or less significant in previous years.
Buy-to-let mortgage costs have risen materially since the Iran conflict pushed rates higher in late February and March. A landlord who has not reviewed their mortgage arrangements since before the conflict may be carrying a rate that has moved against them without a corresponding review. The average two-year fixed rate rose from approximately 4.25% to 5.42% following the outbreak, adding hundreds of pounds annually to properties with outstanding mortgage debt. Zoopla data shows rental growth running at approximately 2.2% annually, which in many cases does not offset the increase in financing costs.
What the rent roll is not telling you
Gross rental income is visible on every monthly statement. Net yield after compliance costs, void periods, management fees, and maintenance is often not calculated clearly.
With Zoopla's May 2026 data showing the average time to let extending to 20 days nationally, void management matters more than it did during the frantic lettings market of 2022 and 2023.
A property sitting empty for three weeks at an average rent of £1,319 per month costs approximately £1,000 in lost income. At current rental growth rates of 2.2%, recovering that loss takes close to a year. Landlords who are tracking gross rent without tracking void frequency and duration are working with an incomplete picture of actual portfolio performance.
Making Tax Digital: The compliance clock
For landlords with gross rental and self-employment income above £50,000, the first quarterly MTD submission covering 6 April to 5 July 2026 is due on 7 August and the deadline is approaching. Landlords who have not yet registered with HMRC, selected compatible software, and begun maintaining digital records are not simply behind on an administrative task. They are at risk of operating outside a legal compliance framework that carries penalties from next year when the soft landing period expires.
The income threshold reduces to £30,000 from April 2027 and £20,000 from April 2028, progressively drawing more landlords into the system. Understanding where your gross income sits relative to those thresholds now avoids a reactive scramble when each new threshold takes effect.
The EPC clock
With October 2030 as the compliance deadline for B and C, the midpoint of 2026 leaves four years to address an estimated 2.5 million below-standard rental properties. For a portfolio landlord with properties at Band D or below, July is the moment to map which properties need what level of improvement, which qualify for grant funding, and how to phase the costs across the remaining compliance window. Contractor availability is already tightening. Early movers access better pricing and more scheduling flexibility.
The mid-year point is not a reporting exercise. It is a decision point.
Talk to our lettings team about your portfolio strategy
