Two corrections:
1] KRA does NOT fix tax bands. that is the job of Minister for Finance; usually done during the budget
2] Tax bands are NEVER change mid year. Even though changes are usually announced during the budget in June, the effective date is always 1st January of the following year.
Nevertheless; a change is way overdue. I can't remember the last time there was an adjustment...could it be close to a decade ago?
Nothing is real unless it can be named; nothing has value unless it can be sold; money is worthless unless you spend it.