Knowledge center

Get an overview of Zelt's features, guides and tutorials covering everything from industry trends to best practices and practical tips for success

Tools & calculators

employer ni calculator switching from 2025 to 2026,

01/08

Employer NI Calculator (Excel) for 2025/26 UK

Use our Employer NI Calculator to estimate NI contributions, or download the Excel version to see how the 2025/26 NIC hike affects your business.

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02/08

ACAS holiday pay calculator (UK 2025)

Use our ACAS holiday pay calculator to accurately calculate holiday entitlement, including pro-rata and final pay. Download the Excel version now!

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maternity pay calculator,maternity leave

03/08

Maternity Pay Calculator for 2025/26

Use this maternity pay calculator to calculate the correct amount of maternity pay that employees are entitled to.

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04/08

Free Maternity Leave Calculator 2025: Check Your Entitlement

Use our Maternity Leave Calculator to understand your employees' maternity leave entitlement, including pay calculations and eligibility requirements.

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05/08

Statutory Sick Pay Calculator for 2025/26

Use this SSP calculator (updated 21/04/2025) to calculate how much statutory sick pay you need to pay employees for the tax year 2025/26.

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06/08

Statutory Redundancy Pay Calculator for 2025/26

Use this redundancy pay calculator to calculate redundancy pay and download a free excel version to make your own calculations.

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07/08

Overtime Calculator 2025/26 | Calculate Overtime Pay

Use this overtime calculator to find out how much you have to pay your employees for overtime work over regular working hours.

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08/08

9 Day Fortnight Calculator

Use our 9 day fortnight calculator to figure out your compressed hours based working pattern. Stay productive while enjoying an extra day off.

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Guides

More guides

People

12 Jun 2025

A Guide to Flexible Benefits: Packages, Perks, Taxation

Compliance

19 May 2025

The 15 essential legal docs every startup needs

Compliance

04 May 2025

Compassionate leave and bereavement leave in the UK

People

26 Jul 2023

Embracing the 9 day fortnight: a guide to compressed hours

People

12 Apr 2023

Performance Reviews: Full Guide, Benefits & Best Tips

colorful cube made out of other small cubes

People

17 Sep 2022

What is the 9-Box Model? An Employer's Guide

Time management

15 Jun 2022

The Employer's guide to the types of leave in the UK

Payroll

05 May 2022

The ultimate guide to salary benchmarking

Payroll

22 Apr 2022

How to choose the right payroll software

Payroll

20 Mar 2021

A step-by-step guide to payroll management

Frequently asked questions

How can I manage multiple roles from one account?

Zelt is a single and configurable platform where you and your employees have the same interface. Admins have full control over what different employees and accounts will be able to see and do in Zelt. You can create your own custom permission groups with inclusion and exclusion rules for who it applies to.

How can I run payroll for all employees?

Zelt's Global Payroll lets you set up your global operations in a few simple steps. Integrate your benefits, absence and attendance pay, expenses and more for your team once and scale it for the distributed teams, avoiding any double-work.

How can I include all devices in my workspace?

Zelt's Devices app lets you manage your asset register with ease. Deploy security policies to your devices or specific groups of employees for your Apple, Windows or Android devices. Enable self-service for device owners if they run into any trouble or security issues - Zelt will guide them through the steps.

How do I contact support?

Zelt has an in-app chat which is available to everyone, so you can contact the team directly anytime. Otherwise you can contact us at support@zelt.app, where we aim to get back to you within 1-2 days.