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Spotted an error, a rate that needs updating, or have a calculator you would like us to add? Send us a message.

Email: hello@sumtoolkit.com

We read every message, though we may not be able to reply to all of them. We cannot give personal tax or financial advice.

Estimates only. These calculators give a guide and are not financial, tax or legal advice. Tax figures use the Nigeria Tax Act 2025 rates effective January 2026. Loan and savings results depend on your lender's or provider's exact terms. Check details with the lender, your employer, a qualified adviser or the relevant authority before you decide.