Applying for a variation
DPPs can be varied to change the monthly payment. You apply to AiB with evidence of the change (payslips, benefit letters, etc).
Reasonable variations are usually approved. Reducing the payment extends the DPP; increasing it shortens it.
Variations require notice to creditors, who can comment but do not have the same veto they would have on the original DPP.
Income increases
If your income rises significantly and you can afford more, AiB may expect you to increase the payment. This is not automatic but is part of the fair treatment principle.
Windfalls (inheritance, PPI refunds, redundancy payments) usually need to be paid into the DPP.
Payment breaks
Short-term payment breaks (a month or two) can often be arranged informally. Longer breaks require a variation.
DPP revocation
Persistent non-payment without engagement can lead AiB to revoke the DPP. Debts then revert to unprotected status and interest can be added again.
Communication early is what prevents revocation. Talking to your Money Adviser or DAS Administrator about problems as they arise almost always leads to a workable solution.