Russell Larson and Connie Marie Pfister are the parents of Holly Marie Pfister, born July 14,1988. Russell was adjudicated to be Holly’s father in 1990 and was ordered to pay $350 per month in child support. In April 1995, Russell, claiming a substantial change in circumstances, filed a second modification action, requesting a reduction in child support to SllO.Se. 1 Russell claims he is operating his farm at a net loss. He also claims that due to health reasons he is getting out of farming and his income will subsequently decrease as a result. Finally, Russell claims any child support obligation should be offset by the amount of dependent social security benefits which Holly receives. The district court denied the application and Russell appeals.
Scope of review.
We review orders on applications to modify child support provisions de novo; nevertheless, the trial court has reasonable discretion in determining whether modification is warranted, and such discretion will not be disturbed on appeal unless there is failure to do equity. Iowa R.App. P. 4;
In re Marriage of Vetternack,
Substantial change of circumstances.
What we must resolve in this case is whether there was a substantial change of circumstance in Russell’s net farm income from the time the original support was set in 1990 to the time of trial which would justify a modification of child support. The burden is on Russell to prove such change warrants a modification in his child support obligations.
Ellis v. Ellis,
1) There must be a substantial and material change in the circumstances occurring after the entry of the Decree;
2) Not every change in circumstances is sufficient;
3) It must appear that continued enforcement of the original Decree would, as a result of changed conditions, result in positive wrong or injustice;
4) The change in circumstances must be permanent or continuous rather than temporary;
5) The change in financial conditions must be substantial; and
6) The change in circumstances must not have been within the contemplation of the trial court when the original Decree was entered.
See In re Marriage of Vetternack,
I. Net income; income-producing assets. At the time of trial, Russell was sixty-five years of age. He has farmed most of his life, owning a 318-acre farm. Russell receives annual CRP payments in the amount of $17,399, and rents out fifteen acres in pasture for an additional $1750 a year. Russell was soon eligible to receive social security benefits of $460 per month and Holly was eligible to receive dependent social security benefits in the amount of $230 per month until she reaches eighteen years of age.
Connie was thirty-five, unemployed since Holly’s birth, and receiving $361 per month in public assistance for Holly. Connie has *515 only minimal assets and lives at her parent’s home with Holly.
The trial court found RusseU’s net worth' to be $164,195. Russell listed on his financial affidavit his 318 acres of farm land (240 tillable acres) valued at $238,500. ■ That would calculate to be under $750 per acre, which we recognize as low. There are two mortgages against the land, $22,000 in favor of FHA and $52,785 in favor of Homeland Bank. The net value of the land is then $163,715. In addition, Russell owns some livestock, which is fully encumbered, and farm machinery, unencumbered, valued at $20,500. Given the land and the machinery alone, Russell’s net worth is $184,215.
While the child support guidelines are based on the parties’ income, a trial court may in its discretion consider the parties’ net worth as a permissible factor in setting or modifying child support. Such consideration is appropriate as the trial court can deviate from the child support guidelines as necessary to provide for the needs of the children and to do justice between the parties under the special circumstances of the case.
In re Marriage of Lalone,
Even if, as RusseU claims, his declining health impedes his abfiity to operate the farm himself, RusseU has faded to show that his physical impairment deprives him of the financial resources to meet his legal chüd support obUgation. Most of Russell’s farmland (205 out of 240 tillable acres) is in the federal C.R.P. program, producing annual payments of $17,399. Additionally, RusseU rents out fifteen acres of pasture. Even if RusseU were totally incapable of working on the farm, we would, as the trial court did, impute income from such a substantial asset.
The trial court additionally considered RusseU’s actual adjusted gross income from his tax returns. His income had not varied substantially over the past six years, nor did his income substantially differ from the farm income in 1990 when the original support was set. In fact, Russell’s gross farm income is actually larger than it was in 1989. The fluctuating nature of farm income does not justify an award of child support based on a shding scale, according to each year’s income.
See In re Marriage of Blume,
The trial court has reasonable discretion in determining whether modification of chüd support is warranted and the court’s findings wül not be disturbed on appeal unless there is failure to do equity.
In re Marriage of Smith,
II. Social security and child support payments.
RusseU next contends any
*516
child support he owes should be offset against the social security benefit Holly receives. “As between the parties, the burden of seeking modification of a support order rightfully lies with the parent who seeks to offset a support obligation against social security benefits.”
Newman v. Newman,
Russell cites the
Newman
case to advance his argument: “The rule in Iowa is that a child support award may be offset by social security benefits during the period in which the benefits are received.”
Newman,
Russell is asking his child support to be offset by
retirement
benefits. First we must distinguish between social security retirement benefits and social security disability benefits. Disability payments are a
substitute
for income.
See Potts v. Potts,
Conversely, social security benefits are a supplement to income. 42 U.S.C. § 301 (1994). Retirement age is not an unforeseeable fact. Unlike a disability, reaching retirement age to qualify for social security income does not automatically take away, a person’s ability to earn income. In this case, Russell retained his income-producing farm and now he has additional income in the form of retirement social security income.
Next, we turn to the issue of whether there should be a credit against the child support for the amount of dependent social security income Holly receives. We look to see how money paid by a source, other than the noncustodial parent, affects the child support obligation by examining Iowa Code section 598.22:
Payments to persons other than the Clerk of the District Court and the collection service center do not satisfy the support obligations created by the orders or judgments, except ... for dependent benefits paid to the child support obligee as the result of disability benefits awarded to the child support obligor under the federal Social Security Act.
Id.
(Emphasis added.) A plain reading of this code section does not encompass social security
retirement
benefits. For Russell to argue it is the “intent and spirit” of section 598.22 to include retirement benefits is to read beyond the plain language of the statute. ‘What the legislature did not say may be as significant as what it said.”
Patterson v. Iowa Bonus Bd.,
Some courts have allowed a credit based on the “earned” character of such federal benefits. These courts have reasoned that such credit is equitable as the benefits were earned during employment by the parent obligated to pay support.
See Lopez v. Lopez,
Other courts have refused to permit a retired noncustodial parent to receive credit against child support obligations for social security and V.A. benefits received by the children from that parent’s account.
See, e.g., Stultz v. Stultz,
Notwithstanding both lines of cases, our legislature has not included social security retirement benefits in section 598.22 and we decline to read beyond the clear language of the statute.
See Caskey,
Accordingly, we find the district court correctly denied Russell’s request to offset the social security benefits received by Holly from his child support obligation.
AFFIRMED.
Notes
. In 1991, following a show-cause hearing, the district court found Russell in contempt for failure to make his child support payments. The court found Russell was not credible and was putting other obligations ahead of his child support payments. A second show-cause hearing was set in early 1992 when Russell unsuccessfully petitioned the court to reduce his child support obligation.
. The court imputed to Russell a net annual income of $12,000, after taxes, plus social securi- ’ ty income of $460 per month, which translates to a net monthly income of $1460.
