Calculating Maternity Pay for Employers: The 2026 Comprehensive Guide to SMP Compliance

Getting your Statutory Maternity Pay (SMP) calculations wrong isn’t just a minor administrative slip; it’s a direct invitation for HMRC penalties and a breakdown in employee trust. We understand that the pressure to support your team whilst managing the bottom line can feel like a delicate balancing act. It’s entirely natural to feel a sense of trepidation when faced with the nuances of calculating maternity pay for employers, especially when navigating “relevant periods” and the shifting rates of the 2026/27 tax year.

This guide will empower you to master these complexities, ensuring your business remains fully compliant and your expectant staff feel valued. We’ll provide a clear, methodical breakdown of everything from the £194.32 weekly statutory rate to the intricacies of salary sacrifice and the strategic framework for offering enhanced pay. By the end, you’ll have the confidence to manage these payroll transitions with total precision and professional empathy.

Understanding Statutory Maternity Pay (SMP) Obligations for UK Employers in 2026

Statutory Maternity Pay (SMP) is a fundamental legal obligation for UK businesses, ensuring that expectant mothers receive a baseline level of financial support during their leave. For directors and managers, calculating maternity pay for employers is a task that requires both technical accuracy and a proactive approach to communication. To be eligible, an individual must have worked for your business for a continuous period of at least 26 weeks leading into the “qualifying week”. Additionally, their average weekly earnings must meet or exceed the Lower Earnings Limit (LEL), which is set at £129 per week for the 2026/27 tax year.

The payment schedule is strictly defined over 39 weeks. During the first six weeks, the employee is entitled to 90% of their average weekly earnings (AWE) with no ceiling. The following 33 weeks are paid at the statutory rate of £194.32 or 90% of their AWE, whichever is the lower figure. When calculating maternity pay for employers, we recommend double-checking these figures against the latest HMRC tables to account for any mid-year adjustments. Precision here is vital; miscalculations can lead to disgruntled staff and potential employment tribunal claims, which are both costly and damaging to your reputation.

The Qualifying Week and Notice Requirements

Everything begins with the “qualifying week”, which is the 15th week before the Expected Week of Childbirth (EWC). This date acts as the pivot point for both eligibility and calculation. You’ll need to obtain the MAT B1 certificate from your employee, which is usually issued around the 20th week of pregnancy. Efficiently managing this paperwork ensures you have the necessary evidence for HMRC. Whilst employees are required to provide 28 days’ notice for their SMP start date, clear internal policies help ensure this information is captured early, allowing you to plan for their absence with confidence.

Employer Reimbursement: Recovering SMP Costs

You don’t have to shoulder the entire cost of maternity leave alone. Most companies can reclaim 92% of the statutory payments made to staff through their National Insurance reports. For smaller enterprises whose total Class 1 National Insurance is £45,000 or less per year, Small Employers’ Relief allows for a 103% reimbursement. By integrating this recovery process into your outsourced payroll systems, you turn a complex administrative task into a predictable, managed workflow that protects your organisation’s capital and long-term stability.

How to Calculate Average Weekly Earnings (AWE) and the Relevant Period

Calculating maternity pay for employers hinges on the Average Weekly Earnings (AWE) figure. This isn’t just a snapshot of a basic salary; it’s a comprehensive look at what an employee actually earned during a specific window. To manually calculate your employee’s payments, you must first identify the “relevant period”. This is generally the eight-week period ending on the last payday on or before the qualifying week, which is the 15th week before the baby is due.

The definition of “earnings” for SMP purposes includes any gross pay that is subject to Class 1 National Insurance contributions. You must factor in performance-related bonuses, overtime payments, and commission if they were paid during that eight-week window. If an employee was receiving Statutory Sick Pay (SSP) during the relevant period, their AWE might be lower than usual. You must use the actual earnings paid during that window, even if they were reduced due to illness. This can unfortunately impact the final SMP rate, so clear and empathetic communication with your employee is essential to manage their expectations.

Identifying the Relevant Period Correctly

Finding the exact start and end dates is where most errors occur. For a weekly-paid employee, you count back eight weeks from the last payday before the qualifying week. For monthly staff, you must use the last two monthly paydays. If an employee’s pay fluctuates due to commission cycles, the timing of these paydays can significantly alter the final AWE. If the timing is slightly off, the entire calculation fails compliance. We often find that businesses benefit from outsourced payroll support to ensure these windows are captured with absolute precision, especially when paydays fall on bank holidays or weekends.

The Impact of Salary Sacrifice on SMP Calculations

Salary sacrifice schemes, such as childcare vouchers or pension contributions, present a unique challenge. Because SMP is calculated based on earnings subject to National Insurance, any amount “sacrificed” is excluded from the AWE. This can inadvertently push an employee’s earnings below the Lower Earnings Limit of £129 per week, making them ineligible for SMP entirely. It’s a sensitive area that requires transparent communication. We recommend reviewing your hr policies and contracts to ensure employees are aware of how their benefits might affect their statutory entitlements. Mastering the nuances of calculating maternity pay for employers in these scenarios protects both the business and the individual’s financial security.

If you’re feeling overwhelmed by these technicalities, our team provides tailored fractional outsourced HR services to handle the heavy lifting for you.

Contractual Maternity Pay vs SMP: Strategic Analysis for Employers

While Statutory Maternity Pay provides a necessary financial floor, many forward-thinking organisations choose to offer “Enhanced” or “Contractual” Maternity Pay. This strategic decision often serves as a powerful tool for talent retention, particularly in competitive sectors where 66% of employers now provide at least 12 weeks of fully paid leave. When calculating maternity pay for employers, it’s vital to distinguish between what the law mandates and what your specific business culture aims to achieve. Offering more than the statutory minimum can significantly reduce the 23% turnover rate typically seen amongst employees who do not return after maternity leave.

A significant challenge for employees is the sharp drop in income after the first six weeks, when payments shift from 90% of their average earnings to the flat statutory rate of £194.32 per week. Contractual pay allows you to bridge this gap, perhaps by offering full pay for the first three or six months. To ensure these arrangements are legally sound and commercially viable, you must have robust HR policies and contracts in place. For a broader overview of your baseline responsibilities, the Statutory Maternity Pay and Leave: employer guide provides a reliable foundation for your compliance framework.

Clawback Clauses: Protecting the Business Investment

If your organisation provides enhanced payments, you have a legitimate interest in ensuring that the investment encourages a return to work. Clawback clauses allow you to reclaim the “enhanced” portion of the pay if an employee chooses not to return, or leaves shortly after their maternity period ends. These terms must be clearly defined and agreed upon in writing before the leave begins. You cannot, however, reclaim any part of the Statutory Maternity Pay itself, as this is a legal entitlement. Transparency is key here to maintain morale amongst your wider team whilst protecting your bottom line.

Maintaining Benefits During Maternity Leave

Your obligations extend beyond simple cash payments. During the entire maternity leave period, employees are entitled to all their contractual benefits, excluding wages. This includes non-cash perks like health insurance, mobile phone allowances, or company cars if they are part of the standard package. Pension contributions also require careful management; as an employer, you must continue to pay into the scheme based on the employee’s normal salary, even whilst they are on a reduced maternity rate. For more information on maintaining pay standards, see our guide on the National Minimum Wage 2025. Effectively calculating maternity pay for employers involves balancing these ongoing costs with the long-term value of a loyal, supported workforce.

Avoiding Common Compliance Pitfalls in Maternity Administration

Accuracy is paramount when managing maternity leave, yet many organisations stumble over technicalities that fall outside the standard eight-week calculation window. While we have already established the baseline for calculating maternity pay for employers, you must also remain vigilant about events that occur after the leave has commenced. A simple oversight regarding a company-wide pay increase or a poorly documented work day can quickly escalate into a compliance nightmare. Protecting your business requires a proactive approach to these less obvious regulatory hurdles.

One of the most sensitive areas involves restructuring. If your organisation undergoes changes, you must provide specific redundancy advice and support to those on leave, as pregnant employees and those on maternity leave enjoy enhanced legal protections. Any failure to follow the correct procedure during a redundancy process can lead to claims of automatic unfair dismissal or pregnancy discrimination. Similarly, managing “Keeping in Touch” (KIT) days requires careful oversight. You can offer up to 10 KIT days, allowing employees to work without ending their maternity period or losing their SMP. These days are optional and must be mutually agreed upon, but they provide a vital bridge for maintaining professional confidence.

The Alabaster Ruling and Pay Rises

The “Alabaster” ruling is a critical piece of case law that many employers inadvertently ignore. It dictates that if an employee receives a pay rise at any point between the start of the eight-week relevant period and the end of their maternity leave, their SMP must be recalculated. You must act as if the pay rise had been in effect during the original calculation window. This often results in a retrospective increase in the 90% earnings rate for the first six weeks. Failing to adjust these payments can result in significant arrears and potential interest penalties from HMRC. We recommend that your payroll team audits all maternity cases whenever a salary review cycle is completed.

Record Keeping and HMRC Compliance

Maintaining a clear paper trail is your best defence during an HMRC audit. You’re legally required to keep records of all maternity payments and the evidence used to calculate them for at least three years after the end of the tax year they relate to. This documentation must include the MAT B1 certificate, any SMP1 forms issued to employees who didn’t qualify, and a detailed breakdown of how you arrived at the AWE figure. Integrating these records into modern employee management software ensures that data is secure, searchable, and easily accessible. When calculating maternity pay for employers, the ability to demonstrate thoroughness is just as important as the calculation itself.

If you’re concerned about your current compliance levels, our specialists can conduct a comprehensive HR audit to identify and resolve any hidden risks in your payroll processes.

Streamlining Maternity Management with Expert HR Support

Managing the intricacies of family leave isn’t just a payroll task; it’s a strategic HR function that requires constant vigilance and a human touch. By utilising fractional outsourced HR services, you can ensure that every calculation is accurate and every policy is compliant without overwhelming your internal team. We act as a proactive extension of your business, providing the specialised expertise needed to handle the micro-details whilst you focus on high-level growth. This collaborative approach turns a complex administrative burden into a streamlined process that supports your employees during one of life’s most significant transitions.

Complex cases, such as those involving the Alabaster ruling or managing redundancies during leave, often require immediate, authoritative guidance. Our 24/7 employment law advice provides that vital safety net, ensuring you’re never navigating a difficult personnel situation in isolation. This level of support doesn’t just resolve issues; it prevents them from escalating into formal grievances by ensuring every step you take is legally sound and ethically grounded. We position ourselves as your stabilising force, helping you maintain a composed and professional workplace culture regardless of the regulatory hurdles you face.

The Benefits of Integrated Payroll and HR

The most common errors in calculating maternity pay for employers stem from a disconnect between HR leave tracking and payroll execution. When these two functions operate in silos, deadlines are often missed and earnings calculations can become flawed. Integrating these processes ensures total security and precision. We help you bridge this gap, creating a seamless workflow where maternity notifications automatically trigger the correct payroll adjustments. This ensures a smooth transition from the initial 90% earnings period to the statutory flat rate, maintaining the psychological security of your staff and the financial integrity of your organisation.

Next Steps for Your Business

To solidify your compliance framework for the 2026/27 tax year, we recommend a methodical approach to your internal processes. You might start by conducting a comprehensive HR audit to identify any gaps in your current family leave policies. It’s also beneficial to invest in training for your management team; how a leader handles a maternity notification often determines an employee’s long-term loyalty to the company. Finally, consider booking a consultation with our team for bespoke support. We’re here to help you master the nuances of calculating maternity pay for employers, turning administrative necessity into a catalyst for long-term organisational stability and talent retention.

Ensuring Long-Term Stability for Your Growing Enterprise

Navigating the technical landscape of 2026 maternity regulations requires a blend of administrative precision and genuine empathy for your team. We’ve explored how mastering the eight-week relevant period and accounting for the Alabaster ruling are essential steps in protecting your organisation from costly HMRC penalties. By proactively calculating maternity pay for employers, you don’t just meet a legal requirement; you build a culture of security that attracts and retains the very best talent.

Whether you need expert Employment Law Advice, bespoke HR policy drafting, or dedicated on-site support for complex grievances, we’re here to act as your strategic partner. Secure your business with expert Outsourced HR Support from Altum HR and let us handle the complexities of regulatory compliance whilst you focus on your company’s future. Our team ensures that every calculation is robust and every policy reflects the unique values of your workplace.

You have the tools to manage these transitions with confidence; we’re simply here to ensure you never have to do it alone. Building a supportive environment for your expectant employees is a vital investment in the lasting success of your business.

Frequently Asked Questions

What is the ‘Relevant Period’ for calculating maternity pay?

The relevant period is the eight-week window used to determine an employee’s average weekly earnings. It typically ends on the last normal payday on or before the qualifying week, which is the 15th week before the expected week of childbirth. This period is vital because it dictates the 90% payment rate for the first six weeks of leave. Identifying these dates correctly is the most critical step in calculating maternity pay for employers to ensure total regulatory compliance.

Can I reclaim Statutory Maternity Pay from the government?

You can reclaim at least 92% of the Statutory Maternity Pay you pay to your employees through your monthly payroll reports. If your business qualifies for Small Employers’ Relief, which applies if your annual National Insurance contributions are £45,000 or less, you can actually reclaim 103%. These reclaims are processed as a reduction in the payments you make to HMRC, helping to manage the cost of maternity leave whilst maintaining your organisation’s productivity.

Do I have to pay maternity pay if an employee has been with us for less than six months?

You aren’t required to pay SMP if an employee has not completed 26 weeks of continuous service by the end of their qualifying week. In these instances, the employee fails the eligibility test, and you must provide them with an SMP1 form explaining the decision. Whilst they won’t receive pay from your business, they may still be eligible to claim Maternity Allowance directly from the government to support them during their leave.

What happens if I give an employee a pay rise whilst they are on maternity leave?

You must recalculate the employee’s SMP if they receive a pay rise at any point between the start of the relevant period and the end of their maternity leave. This legal requirement, stemming from the Alabaster ruling, ensures the employee is not financially penalised for taking leave. You’ll need to pay any arrears resulting from the increase to their 90% earnings rate retrospectively, ensuring your payroll process remains error-free and legally robust.

How do KIT days affect an employee’s maternity pay?

Keeping in Touch (KIT) days allow an employee to work for up to 10 days during their leave without ending their maternity period or losing their SMP. The pay for these days is a matter of agreement between you and the employee; however, it must not fall below the National Minimum Wage. KIT days are a fantastic tool for maintaining professional links, provided both parties agree to the arrangement in writing before the work commences.

Is an employee entitled to bank holidays whilst on maternity leave?

Employees continue to accrue all their statutory and contractual holiday entitlement, including bank holidays, whilst they are away on maternity leave. Since they cannot take annual leave and maternity leave simultaneously, these days are typically added to their entitlement to be taken either before their leave starts or after it ends. This ensures you meet your legal obligations whilst supporting the employee’s phased return to the workplace.

What is the difference between SMP and Maternity Allowance?

SMP is a statutory payment made by you as the employer to eligible staff, which you then reclaim from HMRC. Maternity Allowance is a government benefit paid to individuals who don’t qualify for SMP, such as the self-employed or those with very short service. When calculating maternity pay for employers, identifying the correct entitlement early prevents administrative friction and ensures the expectant employee has a clear understanding of their financial position.

Can I stop an employee’s pension contributions during maternity leave?

You cannot stop your employer pension contributions during any period of paid maternity leave. Your contributions must be based on the employee’s normal, unreduced salary, even if their actual pay has decreased to the statutory rate. The employee’s own contributions will be based on the actual maternity pay they receive. This ensures their long-term financial security is protected, reflecting a modern and supportive approach to personnel management.

Article by

Josephine Broadstock

Josephine Broadstock is the Founder of Altum HR and a recognised thought leader in HR strategy and operational delivery. With a career grounded in employment law and hands-on business support, Josie has built a reputation for helping organisations move beyond transactional HR into truly strategic, commercially aligned people management.

At the core of Josie’s approach is a belief that HR should not sit in isolation—it should actively drive business performance. She works closely with business owners and leadership teams to understand how their organisations function in practice, not just on paper, enabling the design and implementation of people strategies that are both legally robust and operationally effective.

Josie specialises in translating complex employment law and HR challenges into clear, practical solutions that support growth, reduce risk, and improve organisational efficiency. Her work often focuses on bridging the gap between policy and execution—ensuring that processes are not only compliant but also embedded into day-to-day operations in a way that adds measurable value.

Through Altum HR, Josephine leads a team of highly qualified consultants who share her commitment to quality, personalisation, and commercial impact. She is particularly passionate about raising standards within the HR industry, advocating for a more consultative, expert-led approach that prioritises long-term business outcomes over quick fixes.

As an author, Josie shares insights on employment law developments, operational best practice, and real-world HR challenges, offering business leaders practical guidance they can apply immediately. Her content is designed to cut through complexity and provide clarity in an ever-evolving workplace landscape.