Bradford City are in line for a hefty windfall if Huddersfield get promoted.
The Telegraphand Argus understands that there is a promotion clause in the deal that took Nahki Wells across the M62 three years ago.
It is believed the Bradford City would net a further £250,000 should Town go up to the Premier League.
So Valley Parade fans may be tempted to back their rivals in the Championship play-offs. Huddersfield kick off their semi-finals with a home clash against Sheffield Wednesday on Sunday lunchtime.
Wells left City in January 2014 in a move that was worth an initial £1.3m. But with goal and appearance bonuses written in, they have received a further £325,000 in add-ons since.
His former club will also receive a percentage of the profit on any future transfer fee from Huddersfield.
The 26-year-old, a City play-off hero four years ago, has scored ten this season for David Wagner’s side but only once in the last three months.
A promotion payment from the neighbours would be a tidy bonus for Bradford City as they prepare to cash in on a possible return to the Championship for the first time since 2004.
Going up to the second tier is calculated as being worth around £5m straight away in television cash distribution from the EFL.
City could also expect up to £1m on top of that from the increase in commercial money that Championship clubs can receive.
Whatever the result in the League One final against Millwall a week on Saturday, City will receive a hefty share of the Wembley gate receipts.
Once the stadium and league have taken their cut, each team can each expect to get anything from £250,000-£300,000. A large crowd is anticipated, potentially tipping the 70,000 mark, which will increase their income.
But there may be a situation where the losing club takes both amounts.
In the Championship final, teams do a deal whereby the beaten side is allowed to keep the pot.
That has filtered down to League One and it is believed was the case last year when Millwall lost out to Barnsley.