The short answer
The amount borrowed before interest and fees.
What this means for you
The lender must disclose the actual rate, fees, term and total repayable in its offer. An advertised monthly amount is not the whole cost.
For a government employee, your exact position, income, existing repayments and the lender’s programme rules can affect the outcome. Check the complete offer and ask the lender to explain anything you do not understand before accepting credit.
Frequently asked questions
What is the principal amount?
The amount borrowed before interest and fees.
Does working for government guarantee approval?
No. The lender still checks its employer rules, credit information and affordability.
Where can I confirm the terms that apply to me?
The lender’s written quotation and credit agreement will set out the rate, fees, term and total repayable.
Further reading: National Credit Regulator. Source pages describe general rules or lender processes; individual circumstances can differ.